The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Niranjana Behera - One of the best experts on this subject based on the ideXlab platform.
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experimental study and shannon entropy analysis of pressure fluctuations and Flow mode transition in fluidized dense phase pneumatic conveying of fly ash
Particuology, 2020Co-Authors: Yassin Alkassar, Vijay K Agarwal, R K Pandey, Niranjana BeheraAbstract:Abstract The objective of this study was to relate experimental pressure fluctuation behavior to the transition in mode of Flow observed in fluidized dense phase pneumatic conveying of fly ash. Shannon entropy and wavelet analysis were utilized to extract features of the Flow regimes. Daubechies db4 wavelet analysis of pulsating air pressure revealed that the Flow Mechanism of fly ash in a fluidized dense phase possessed non-steady characteristics associated with gradual aeration of dunes along the direction of Flow. Variations of Shannon entropy values along the length of the pipeline were assessed to determine the location at which the Flow converted from dense to dilute phase mode. The effects of conveying parameters and specific power consumption on Shannon entropy and variations of the local power consumption coefficient are discussed.
Peter W Wypych - One of the best experts on this subject based on the ideXlab platform.
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an investigation into pressure fluctuations for fluidized dense phase pneumatic transport of fine powders
Powder Technology, 2015Co-Authors: Anu Mittal, Soumya Suddha Mallick, Peter W WypychAbstract:Abstract This paper presents results of an ongoing investigation into the Flow Mechanism for the pneumatic conveying of fine powders conveyed from fluidized dense phase mode to dilute-phase. Three different techniques of signal analysis (i.e. rescaled range analysis, phase space method and technique of Shannon entropy) have been applied to the pressure fluctuations obtained during the solids–gas Flow of fly ash (median particle diameter 30 μm; particle density 2300 kg m − 3 ; loose-poured bulk density 700 kg m − 3 ) through a 69 mm I.D. × 168 m long pipeline and also white powder (median particle diameter 55 μm; particle density 1600 kg m − 3 ; loose-poured bulk density 620 kg m − 3 ) through a 69 mm I.D. × 148 m long test rig. Results show that with increasing conveying distance (and conveying velocity in the direction of Flow), there is an overall decrease in the values of Hurst exponent, an increase in the area covered by the phase-space diagram and an increase in the Shannon entropy values, indicating an increase in the degree of complexity of Flow Mechanism (or turbulence) along the length of the conveying pipeline. All the three methods have revealed that the closely coupled bends reverse the trend of change of Hurst exponent, phase-space diagram area and Shannon entropy values. This is due to the slowing down of particles caused by the friction of particles along the bend wall resulting in dampened particle turbulence.
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An investigation into the transition of Flow Mechanism during fluidized dense-phase pneumatic conveying of fine powders
Particulate Science and Technology, 2015Co-Authors: Anu Mittal, Soumya Suddha Mallick, Peter W WypychAbstract:ABSTRACTThis paper presents results from an investigation into the changes in Flow Mechanism of pneumatic conveying of fine powders from dilute to fluidized dense-phase. Pressure fluctuations have been analyzed using power spectral density (PSD), Hilbert–Huang transformation (HHT), and wavelet transformation. Pressure fluctuations were obtained from conveying trials performed for two different types of powders, i.e., fly ash (median particle diameter: 30 µm; particle density: 2300 kg m−3; loose-poured bulk density: 700 kg m−3) and white powder (median particle diameter: 55 µm; particle density: 1600 kg m−3; loose-poured bulk density: 620 kg m−3). Power spectra obtained from PSD analysis, energy distribution of intrinsic mode functions obtained from HHT transformation, and wavelet scalogram show unique features related to the changing Flow Mechanism along the length of the pipeline. Results indicate variation from low frequency to higher frequency components in the signal, along the Flow direction. Higher ...
Yassin Alkassar - One of the best experts on this subject based on the ideXlab platform.
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experimental study and shannon entropy analysis of pressure fluctuations and Flow mode transition in fluidized dense phase pneumatic conveying of fly ash
Particuology, 2020Co-Authors: Yassin Alkassar, Vijay K Agarwal, R K Pandey, Niranjana BeheraAbstract:Abstract The objective of this study was to relate experimental pressure fluctuation behavior to the transition in mode of Flow observed in fluidized dense phase pneumatic conveying of fly ash. Shannon entropy and wavelet analysis were utilized to extract features of the Flow regimes. Daubechies db4 wavelet analysis of pulsating air pressure revealed that the Flow Mechanism of fly ash in a fluidized dense phase possessed non-steady characteristics associated with gradual aeration of dunes along the direction of Flow. Variations of Shannon entropy values along the length of the pipeline were assessed to determine the location at which the Flow converted from dense to dilute phase mode. The effects of conveying parameters and specific power consumption on Shannon entropy and variations of the local power consumption coefficient are discussed.
Anu Mittal - One of the best experts on this subject based on the ideXlab platform.
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an investigation into pressure fluctuations for fluidized dense phase pneumatic transport of fine powders
Powder Technology, 2015Co-Authors: Anu Mittal, Soumya Suddha Mallick, Peter W WypychAbstract:Abstract This paper presents results of an ongoing investigation into the Flow Mechanism for the pneumatic conveying of fine powders conveyed from fluidized dense phase mode to dilute-phase. Three different techniques of signal analysis (i.e. rescaled range analysis, phase space method and technique of Shannon entropy) have been applied to the pressure fluctuations obtained during the solids–gas Flow of fly ash (median particle diameter 30 μm; particle density 2300 kg m − 3 ; loose-poured bulk density 700 kg m − 3 ) through a 69 mm I.D. × 168 m long pipeline and also white powder (median particle diameter 55 μm; particle density 1600 kg m − 3 ; loose-poured bulk density 620 kg m − 3 ) through a 69 mm I.D. × 148 m long test rig. Results show that with increasing conveying distance (and conveying velocity in the direction of Flow), there is an overall decrease in the values of Hurst exponent, an increase in the area covered by the phase-space diagram and an increase in the Shannon entropy values, indicating an increase in the degree of complexity of Flow Mechanism (or turbulence) along the length of the conveying pipeline. All the three methods have revealed that the closely coupled bends reverse the trend of change of Hurst exponent, phase-space diagram area and Shannon entropy values. This is due to the slowing down of particles caused by the friction of particles along the bend wall resulting in dampened particle turbulence.
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An investigation into the transition of Flow Mechanism during fluidized dense-phase pneumatic conveying of fine powders
Particulate Science and Technology, 2015Co-Authors: Anu Mittal, Soumya Suddha Mallick, Peter W WypychAbstract:ABSTRACTThis paper presents results from an investigation into the changes in Flow Mechanism of pneumatic conveying of fine powders from dilute to fluidized dense-phase. Pressure fluctuations have been analyzed using power spectral density (PSD), Hilbert–Huang transformation (HHT), and wavelet transformation. Pressure fluctuations were obtained from conveying trials performed for two different types of powders, i.e., fly ash (median particle diameter: 30 µm; particle density: 2300 kg m−3; loose-poured bulk density: 700 kg m−3) and white powder (median particle diameter: 55 µm; particle density: 1600 kg m−3; loose-poured bulk density: 620 kg m−3). Power spectra obtained from PSD analysis, energy distribution of intrinsic mode functions obtained from HHT transformation, and wavelet scalogram show unique features related to the changing Flow Mechanism along the length of the pipeline. Results indicate variation from low frequency to higher frequency components in the signal, along the Flow direction. Higher ...
Barbara Wohlmuth - One of the best experts on this subject based on the ideXlab platform.
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analysis of a new multispecies tumor growth model coupling 3d phase fields with a 1d vascular network
Nonlinear Analysis-real World Applications, 2021Co-Authors: Marvin Fritz, Prashant K Jha, Tobias Koppl, Tinsley J Oden, Barbara WohlmuthAbstract:Abstract In this work, we present and analyze a mathematical model for tumor growth incorporating ECM erosion, interstitial Flow, and the effect of vascular Flow and nutrient transport. The model is of phase-field or diffused-interface type in which multiple phases of cell species and other constituents are separated by smooth evolving interfaces. The model involves a mesoscale version of Darcy’s law to capture the Flow Mechanism in the tissue matrix. Modeling Flow and transport processes in the vasculature supplying the healthy and cancerous tissue, one-dimensional (1D) equations are considered. Since the models governing the transport and Flow processes are defined together with cell species models on a three-dimensional (3D) domain, we obtain a 3D–1D coupled model.