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Akira Rinoshika - One of the best experts on this subject based on the ideXlab platform.

  • characteristics of particle velocity and concentration in a horizontal self excited gas solid two phase pipe flow of using soft fins
    International Journal of Multiphase Flow, 2012
    Co-Authors: Fei Yan, Akira Rinoshika
    Abstract:

    Abstract In order to reveal the mechanism of the low pressure drop at low air velocity in a horizontal excited gas–solid two-phase pipe flow of using soft fins, the distributions of particle velocity and concentration are measured by the high-speed particle image velocimetry (PIV) and image process. The Test Pipeline consists of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. The polyethylene particles of density 978 kg/m3 and 952 kg/m3 with diameters of 2.3 and 3.3 mm are used as Test materials. The distributions of the time-averaged particle velocity and concentration are measured at the minimum air velocity and the solid mass flow rates of 0.45 kg/s and 0.40 kg/s in the acceleration and fully developed regimes. It is found that the particle concentration of using fins exhibits almost same profile as that of non-fin although the air velocities of using fins are lower than that of non-fin. In the acceleration regime, there is little difference of the normalized axial particle velocity up/Ua between short fins and non-fin. up/Ua of the long fins having low air velocity, however, is slightly higher than that of non-fin. In the fully developed regime, even though up/Ua of using long fins is obviously lower than that of other fins and non-fin in the lower part of Pipeline, the steady gas–solid two-phase flow can be observed. It suggests that the long fins easily accelerate the particles and result in low pressure drop and low air velocity. For the relatively large particles, the effect of fins on up/Ua is smaller than that for the small particles. Due to the effect of fins’ oscillation, the vertical particle velocity decreases in the low part of Pipeline, resulting in the particle dispersion and the reduction of particles–wall collision.

  • an experimental study on a horizontal energy saving pneumatic conveying system with soft fins
    Powder Technology, 2012
    Co-Authors: Akira Rinoshika, Hironobu Nonaka
    Abstract:

    Abstract In order to reduce power consumption and conveying velocity, a new pneumatic conveying system where soft fins are mounted in a horizontal plane through the pipe axis in the front of inlet is proposed in this paper. The experimental study focuses on the effect of the different fin's lengths on the horizontal pneumatic conveying system in terms of frequency characteristics of fin's oscillation, pressure drop, conveying velocity, particle flow pattern, power consumption and additional pressure drop. The Test Pipeline consisted of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. The polyethylene spherical particles of density 978 kg/m 3 and 952 kg/m 3 with diameters of 2.3 mm and 3.3 mm are used as conveying materials. The mean air velocity is varied from 10 to 17 m/s, and the solid mass flow rate is from 0.20 to 0.45 kg/s. Comparing with the conventional pneumatic conveying, the pressure drop, minimum and critical velocities, power consumption and additional pressure drop can be reduced by using soft fins in lower air velocity range. The efficiency of fin is quite evident with increasing the length of fin. The maximum reduction rates of the minimum velocity and power consumption by using soft fins are about 14.8% and 25.5%, respectively. By analyzing the frequency characteristics of fin's oscillation, Strouhal number of more efficient fins is about S t  = 0.65 in the range of low air velocity.

  • application of high speed piv and image processing to measuring particle velocity and concentration in a horizontal pneumatic conveying with dune model
    Powder Technology, 2011
    Co-Authors: Akira Rinoshika
    Abstract:

    Abstract The purpose of this study focuses on analyzing the particle velocity and concentration characteristics in a horizontal pneumatic conveying with dune model, so as to reveal the mechanism of the low conveying velocity and saving-energy conveying. The Test Pipeline consisted of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. The polyethylene particles of density 978 kg/m 3 and 952 kg/m 3 with diameters of 2.3 and 3.3 mm are used as conveying materials. High-speed PIV was first applied to measure the time-averaged particle velocity and was proven to be an efficient measurement technique in the pneumatic conveying. Then the particle velocity and concentration distributions of three locations were measured at mean air velocities of 12 m/s and 13 m/s and the solid mass flow rates of 0.45 kg/s and 0.43 kg/s. A comparison of the particle velocity and concentration profiles between dune model and non-dune model was performed. It is found that the particle concentration of using dune model becomes higher in the upper part of Pipeline and becomes lower near the bottom of Pipeline in the acceleration region. The particle velocities of using dune model are clearly higher than that of the conventional pneumatic conveying along Pipeline and display a uniform profile at the downstream. It is also clear that the particles can be effectively accelerated by increasing air velocity and impacting the surface of dune model. The effect of dune model on the velocity profile of relatively small particles is larger than that of the larger particles and maintains to the downstream.

  • an experimental study of energy saving pneumatic conveying system in a horizontal Pipeline with dune model
    Powder Technology, 2010
    Co-Authors: Akira Rinoshika, Masahito Suzuki
    Abstract:

    Abstract In order to reduce power consumption and conveying velocity, a pneumatic conveying system where a dune model is mounted in a Pipeline is proposed in this paper. The experimental study focuses on the effect of the mounted dune model in the horizontal pneumatic conveying system in terms of pressure drop, power consumption and conveying velocity. The Test Pipeline consisted of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. Polyethylene spherical particles with a density of 952 kg/m3 and diameters of 2.3 and 3.3 mm are used as conveying materials. The mean air velocity is varied from 9 to 16 m/s, and the solid mass flow rate is from 0.25 to 0.45 kg/s. Firstly, the effect of the dune model location on pneumatic conveying is experimentally studied. It is found that in the lower air velocity range, the pressure drop of the pneumatic conveying with a mounted dune model is lower than that of a conventional pneumatic conveying system. A lower conveying velocity and energy-saving conveying can be realized by installing a dune model in the conveying pipe. Especially the case of fixing the dune model on the bottom of the pipe at the inlet of particle feed is more effective. The particle flow patterns also show that the dune model reduces the deposition of particles. Then, the effect of different surface materials of the dune model is examined. By using a surface material of the dune model with a large coefficient of restitution, the pressure drop of conveying large particles is the lowest. When conveying relatively small particles, however, the pressure drop becomes the lowest by a small coefficient of restitution. The maximum reduction rates of the minimum velocity and power consumption by the dune model are about 19% and 34%, respectively.

Masahito Suzuki - One of the best experts on this subject based on the ideXlab platform.

  • an experimental study of energy saving pneumatic conveying system in a horizontal Pipeline with dune model
    Powder Technology, 2010
    Co-Authors: Akira Rinoshika, Masahito Suzuki
    Abstract:

    Abstract In order to reduce power consumption and conveying velocity, a pneumatic conveying system where a dune model is mounted in a Pipeline is proposed in this paper. The experimental study focuses on the effect of the mounted dune model in the horizontal pneumatic conveying system in terms of pressure drop, power consumption and conveying velocity. The Test Pipeline consisted of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. Polyethylene spherical particles with a density of 952 kg/m3 and diameters of 2.3 and 3.3 mm are used as conveying materials. The mean air velocity is varied from 9 to 16 m/s, and the solid mass flow rate is from 0.25 to 0.45 kg/s. Firstly, the effect of the dune model location on pneumatic conveying is experimentally studied. It is found that in the lower air velocity range, the pressure drop of the pneumatic conveying with a mounted dune model is lower than that of a conventional pneumatic conveying system. A lower conveying velocity and energy-saving conveying can be realized by installing a dune model in the conveying pipe. Especially the case of fixing the dune model on the bottom of the pipe at the inlet of particle feed is more effective. The particle flow patterns also show that the dune model reduces the deposition of particles. Then, the effect of different surface materials of the dune model is examined. By using a surface material of the dune model with a large coefficient of restitution, the pressure drop of conveying large particles is the lowest. When conveying relatively small particles, however, the pressure drop becomes the lowest by a small coefficient of restitution. The maximum reduction rates of the minimum velocity and power consumption by the dune model are about 19% and 34%, respectively.

Hironobu Nonaka - One of the best experts on this subject based on the ideXlab platform.

  • an experimental study on a horizontal energy saving pneumatic conveying system with soft fins
    Powder Technology, 2012
    Co-Authors: Akira Rinoshika, Hironobu Nonaka
    Abstract:

    Abstract In order to reduce power consumption and conveying velocity, a new pneumatic conveying system where soft fins are mounted in a horizontal plane through the pipe axis in the front of inlet is proposed in this paper. The experimental study focuses on the effect of the different fin's lengths on the horizontal pneumatic conveying system in terms of frequency characteristics of fin's oscillation, pressure drop, conveying velocity, particle flow pattern, power consumption and additional pressure drop. The Test Pipeline consisted of a horizontal smooth acrylic tube with an inside diameter of 80 mm and a length of about 5 m. The polyethylene spherical particles of density 978 kg/m 3 and 952 kg/m 3 with diameters of 2.3 mm and 3.3 mm are used as conveying materials. The mean air velocity is varied from 10 to 17 m/s, and the solid mass flow rate is from 0.20 to 0.45 kg/s. Comparing with the conventional pneumatic conveying, the pressure drop, minimum and critical velocities, power consumption and additional pressure drop can be reduced by using soft fins in lower air velocity range. The efficiency of fin is quite evident with increasing the length of fin. The maximum reduction rates of the minimum velocity and power consumption by using soft fins are about 14.8% and 25.5%, respectively. By analyzing the frequency characteristics of fin's oscillation, Strouhal number of more efficient fins is about S t  = 0.65 in the range of low air velocity.

Alba-alejandre Ignacio - One of the best experts on this subject based on the ideXlab platform.

  • Micro-CTstudy of the functional anatomy of two pest insects species, the Asian citrus psyllid, Diaphorina citri (Hemiptera: Liviidae) and the coffee berry borer, Hypothenemus hampei (Coleoptera, Curculionidae)
    'Editorial de la Universidad de Granada', 2020
    Co-Authors: Alba-alejandre Ignacio
    Abstract:

    Esta tesis se ha subvencionado con el subproyecto-contrato S15192.01 realizado entre la “Kansas State University (KSU)” y la Universidad de Granada (UGR), como parte del proyecto “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease”. (USDA-NIFA Award 2014-70016-23028: 2015-2020) coordinado por Susan J. Brown (KSU), (www.citrusgreening.org).El objetivo principal de esta tesis doctoral ha sido realizar un estudio microtomográfico detallado (con imágenes 3D de alta resolución y vídeos) de la anatomía externa e interna de dos especies de insectos plaga: el psílido asiático de los cítricos (Diaphorina citri Kuwayama, 1908) y la broca del café (Hypothenemus hampei Ferrari, 1867), de gran importancia a nivel mundial por los enormes daños y pérdidas económicas que provocan. Adicionalmente, durante la realización del estudio de la actividad de H. hampei en el interior de la cereza del café, encontramos especímenes del gorgojo del grano de café (Araecerus fasciculatus De Geer en 1775) emergiendo de las cerezas del café, este descubrimiento motivó un estudio del mismo y su actividad dentro de la cereza del café, que fue objeto de una publicación adicional al respecto y que se incluye como material adicional.The main objective of this doctoral thesis has been to carry out a detailed microtomographic study (with high resolution 3D images and videos,) of the external and internal anatomy of two species of insect pests: the Asian citrus psyllid (Diaphorina citri Kuwayama, 1908) and the coffee berry borer (Hypothenemus hampei Ferrari, 1867), of great importance worldwide due to the enormous damage and economic losses they cause. Additionally, during the study of H. hampei's activity within the coffee cherry, we found specimens of the coffee bean weevil (Araecerus fasciculatus De Geer in 1775) emerging from coffee cherries. This discovery motivated a study of the bean weevil and its activity within the coffee berry, which was the object of an additional publication on the subject and which is included as additional material.Tesis Univ. Granada.Subproyecto-contrato S15192.01 realizado entre la “Kansas State University (KSU)” y la Universidad de Granada (UGR), como parte del proyecto “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease”. (USDA-NIFA Award 2014-70016-23028: 2015-2020

  • Revealing the respiratory system of the coffee berry borer (Hypothenemus hampei; Coleoptera: Curculionidae: Scolytinae) using micro-computed tomography
    'Springer Science and Business Media LLC', 2019
    Co-Authors: Alba Tercedor, Francisco Javier, Alba-alejandre Ignacio, Vega, Fernando E.
    Abstract:

    The coffee berry borer (Hypothenemus hampei) is the most economically important insect pest of coffee globally. Micro-computed tomography (micro-CT) was used to reconstruct the respiratory system of this species for the first time; this is the smallest insect (ca. 2 mm long) for which this has been done to date. Anatomical details of the spiracles and tracheal tubes are described, images presented, and new terms introduced. The total volume and the relationship between tracheal lumen diameter, length and volume are also presented. The total length of the tracheal tubes are seventy times the length of the entire animal. Videos and a 3D model for use with mobile devices are included as supplementary information; these could be useful for future research and for teaching insect anatomy to students and the public in general.This paper benefitted from the sub-award agreement S15192.01 between Kansas State University (KSU) and the University of Granada, as part of a USDANIFA Award 2014-70016-23028 to S.J. Brown (KSU), “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease” (2015–2020)

  • Anatomical study of the coffee berry borer (Hypothenemus hampei) using micro-computed tomography
    'Springer Science and Business Media LLC', 2019
    Co-Authors: Alba-alejandre Ignacio, Alba Tercedor, Francisco Javier, Vega, Fernando E.
    Abstract:

    Traditionally, the study of anatomy in insects has been based on dissection techniques. Microcomputed tomography (micro-CT) is an X-ray based technique that allows visualization of the internal anatomy of insects in situ and does not require dissections. We report on the use of micro-CT scans to study, in detail, the internal structures and organs of the coffee berry borer (Hypothenemus hampei), the most damaging insect pest of coffee worldwide. Detailed images and videos allowed us to make the first description of the aedeagus and the first report of differences between the sexes based on internal anatomy (flight musculature, midgut shape, hindgut convolutions, brain shape and size) and external morphology (lateral outline of the pronotum and number of abdominal tergites). This study is the first complete micro-CT reconstruction of the anatomy of an insect and is also the smallest insect to have been evaluated in this way. High quality rendered images, and additional supplementary videos and 3D models are suitable for use with mobile devices and are useful tools for future research and as teaching aids.This paper benefitted from sub-award agreement S15192.01 between Kansas State University (KSU) and the University of Granada, as part of the USDA-NIFA Award 2014-70016-23028 to Susan J. Brown (KSU), “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease” (2015–2020)

  • Micro-CT study of male genitalia and reproductive system of the Asian citrus psyllid, Diaphorina citri Kuwayama, 1908 (Insecta: Hemiptera, Liviidae)
    'Public Library of Science (PLoS)', 2018
    Co-Authors: Alba-alejandre Ignacio, Hunter, Wayne B., Alba Tercedor, Francisco Javier
    Abstract:

    The Asian citrus psyllid (ACP), Diaphorina citri, is a major vector of the bacteria Candidatus Liberibacter asiaticus and C.L. americanus, which cause Huanglongbing disease (HLB) (aka Citrus greening disease), considered the most serious bacterial disease of citrus trees. As part of a multidisciplinary project on psyllid biology (www.citrusgreening.org), the results presented here concern a detailed anatomical study of the male reproductive system (Testes, seminal vesicles, accessory glands, sperm pump, connecting ducts, and aedeagus) using micro-computed tomography (micro-CT). The study summarizes current knowledge on psyllids male reproductive system and represents significant advances in the knowledge of ACP anatomy.This work was supported by USDA-NIFA Award 2014-70016-23028 ªDeveloping an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Diseaseº, 2015-2020

Alba Tercedor, Francisco Javier - One of the best experts on this subject based on the ideXlab platform.

  • Revealing the respiratory system of the coffee berry borer (Hypothenemus hampei; Coleoptera: Curculionidae: Scolytinae) using micro-computed tomography
    'Springer Science and Business Media LLC', 2019
    Co-Authors: Alba Tercedor, Francisco Javier, Alba-alejandre Ignacio, Vega, Fernando E.
    Abstract:

    The coffee berry borer (Hypothenemus hampei) is the most economically important insect pest of coffee globally. Micro-computed tomography (micro-CT) was used to reconstruct the respiratory system of this species for the first time; this is the smallest insect (ca. 2 mm long) for which this has been done to date. Anatomical details of the spiracles and tracheal tubes are described, images presented, and new terms introduced. The total volume and the relationship between tracheal lumen diameter, length and volume are also presented. The total length of the tracheal tubes are seventy times the length of the entire animal. Videos and a 3D model for use with mobile devices are included as supplementary information; these could be useful for future research and for teaching insect anatomy to students and the public in general.This paper benefitted from the sub-award agreement S15192.01 between Kansas State University (KSU) and the University of Granada, as part of a USDANIFA Award 2014-70016-23028 to S.J. Brown (KSU), “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease” (2015–2020)

  • Anatomical study of the coffee berry borer (Hypothenemus hampei) using micro-computed tomography
    'Springer Science and Business Media LLC', 2019
    Co-Authors: Alba-alejandre Ignacio, Alba Tercedor, Francisco Javier, Vega, Fernando E.
    Abstract:

    Traditionally, the study of anatomy in insects has been based on dissection techniques. Microcomputed tomography (micro-CT) is an X-ray based technique that allows visualization of the internal anatomy of insects in situ and does not require dissections. We report on the use of micro-CT scans to study, in detail, the internal structures and organs of the coffee berry borer (Hypothenemus hampei), the most damaging insect pest of coffee worldwide. Detailed images and videos allowed us to make the first description of the aedeagus and the first report of differences between the sexes based on internal anatomy (flight musculature, midgut shape, hindgut convolutions, brain shape and size) and external morphology (lateral outline of the pronotum and number of abdominal tergites). This study is the first complete micro-CT reconstruction of the anatomy of an insect and is also the smallest insect to have been evaluated in this way. High quality rendered images, and additional supplementary videos and 3D models are suitable for use with mobile devices and are useful tools for future research and as teaching aids.This paper benefitted from sub-award agreement S15192.01 between Kansas State University (KSU) and the University of Granada, as part of the USDA-NIFA Award 2014-70016-23028 to Susan J. Brown (KSU), “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease” (2015–2020)

  • Asian citrus psyllid stylet morphology and applicability to the model for inter-instar stylet replacement in the potato psyllid
    'Elsevier BV', 2018
    Co-Authors: Cicero, Joseph M., Alba Tercedor, Francisco Javier
    Abstract:

    In Hemiptera, presumptive stylets for each consecutive postembryonic instar are manufactured prior to ecdysis to replace the ecdysial stylets discarded with the exuviae. With the discovery that the bacterium “Candidatus” Liberibacter solanacearum accesses the tissues involved in the stylet replacement process of the potato psyllid, a hypothesis was formed that the bacterium could adhere to the stylets of freshly emerged instars and hence gain access to the host plant when feeding is resumed. Although unproven, it was imperative that a model for stylet replacement be built. Stylet morphology and the stylet replacement process of the Asian citrus psyllid (ACP), vector of “C.” L. asiaticus, causal pathogen of citrus greening disease, are comparable to the potato psyllid model system. Morphology consists of a basal terminus with its tab-shaped auricle, a base, shaft, and an apical terminus. Each of the four auricles act as a platform for the replacement apparatus, which is compacted into a tight aggregate of cells, the ‘endcap’. As modeled, on apolysis of larval instar hypodermis, the aggregate ‘deconstructs’ and expands into a snail shell-shaped tube, the ‘atrium’, that houses the presumptive stylet as it is synthesized. Completed stylets then despool from the atrium and are fitted into their functional positions as the next instar emerges from its exuviae.Funding was provided by a grant from USDA-NIFA Award 2014- 70016-23028, 2015-2020, “Developing an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Disease”

  • Micro-CT study of male genitalia and reproductive system of the Asian citrus psyllid, Diaphorina citri Kuwayama, 1908 (Insecta: Hemiptera, Liviidae)
    'Public Library of Science (PLoS)', 2018
    Co-Authors: Alba-alejandre Ignacio, Hunter, Wayne B., Alba Tercedor, Francisco Javier
    Abstract:

    The Asian citrus psyllid (ACP), Diaphorina citri, is a major vector of the bacteria Candidatus Liberibacter asiaticus and C.L. americanus, which cause Huanglongbing disease (HLB) (aka Citrus greening disease), considered the most serious bacterial disease of citrus trees. As part of a multidisciplinary project on psyllid biology (www.citrusgreening.org), the results presented here concern a detailed anatomical study of the male reproductive system (Testes, seminal vesicles, accessory glands, sperm pump, connecting ducts, and aedeagus) using micro-computed tomography (micro-CT). The study summarizes current knowledge on psyllids male reproductive system and represents significant advances in the knowledge of ACP anatomy.This work was supported by USDA-NIFA Award 2014-70016-23028 ªDeveloping an Infrastructure and Product Test Pipeline to Deliver Novel Therapies for Citrus Greening Diseaseº, 2015-2020