The Experts below are selected from a list of 33 Experts worldwide ranked by ideXlab platform

Oscar Mauricio Hernandez Rodriguez - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Liquid Viscosity and Geometry on Vertical Gas/Liquid Two-Phase Annular-Duct Flow
    SPE Journal, 2020
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Summary Two-phase flow in large Annular Ducts is very common in industrial applications. Nevertheless, many two-phase-flow phenomena in such a geometry have not been fully understood. This article addresses an investigation on the effects of Duct geometry and liquid viscosity on vertical upward Annular-Duct two-phase flows. Compressed air and tap water or mineral oil were the working fluids. Three oil viscosity ranges were tested, from 30 to 400 mPa·s. A 10.0-m-long inclinable experimental setup was designed and built for the experiments conDucted in two equivalent geometries. The first is made of a 95-mm-inner-diameter circular pipe (called the reference pipe), and the second is a Concentric Annular Duct with 95-mm hydraulic diameter, the same diameter as the reference pipe. The radial geometries were similar to those observed in oil wells. Flow patterns, total pressure drop, and in-situ volumetric fractions were obtained. According to the results, the standard hydraulic diameter might not be appropriate for the modeling of vertical gas/liquid flow in large Annular Ducts.

  • phase inversion phenomena in vertical three phase flow experimental study on the influence of fluids viscosity Duct geometry and gas flow rate
    Chemical Engineering Science, 2018
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Abstract Improper sizing of pipelines and proDuction tubings in the petroleum industry is often caused by lack of understanding of three-phase flow, which is characterized by gas flowing together with an immiscible water-oil mixture. There is the presence of a continuous liquid phase and a liquid dispersed phase, as observed in liquid-liquid flows, i.e., one can observe either a dispersion or emulsion of oil in water (o/w) or dispersion or emulsion of water in oil (w/o). The transition from o/w to w/o, or the other way around, is defined as phase-inversion. This phenomenon is characterized by a sharp increase in the pressure gradient, leading to significant pressure loss in the oil proDuction system. The goal is to investigate the effects of oil viscosity, channel geometry (circular pipe or Annular Duct) and superficial gas velocity on the phenomenon of phase inversion in vertical liquid-liquid-gas flows, using oil with three different viscosities (ranging from 70 mPa s to 280 mPa s), tap water and compressed air as working fluids. The experiments were carried out in three different geometries: (i) glass pipe of 50 mm i.d., (ii) glass pipe of 95 mm i.d. and (iii) Concentric Annular Duct with 95 mm of hydraulic diameter (glass outer pipe and PVC internal pipe). The experiments were performed under equivalent Reynolds number to evaluate the geometry effect. New data as total pressure gradient and volumetric fractions were obtained for all geometries. The results suggest that the extrapolation of results obtained in circular pipes with low viscosity oil and low gas flow rates to Annular-Duct flow with viscous oils and high gas flow rates can lead to significant errors.

Alex Roger Almeida Colmanetti - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Liquid Viscosity and Geometry on Vertical Gas/Liquid Two-Phase Annular-Duct Flow
    SPE Journal, 2020
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Summary Two-phase flow in large Annular Ducts is very common in industrial applications. Nevertheless, many two-phase-flow phenomena in such a geometry have not been fully understood. This article addresses an investigation on the effects of Duct geometry and liquid viscosity on vertical upward Annular-Duct two-phase flows. Compressed air and tap water or mineral oil were the working fluids. Three oil viscosity ranges were tested, from 30 to 400 mPa·s. A 10.0-m-long inclinable experimental setup was designed and built for the experiments conDucted in two equivalent geometries. The first is made of a 95-mm-inner-diameter circular pipe (called the reference pipe), and the second is a Concentric Annular Duct with 95-mm hydraulic diameter, the same diameter as the reference pipe. The radial geometries were similar to those observed in oil wells. Flow patterns, total pressure drop, and in-situ volumetric fractions were obtained. According to the results, the standard hydraulic diameter might not be appropriate for the modeling of vertical gas/liquid flow in large Annular Ducts.

  • phase inversion phenomena in vertical three phase flow experimental study on the influence of fluids viscosity Duct geometry and gas flow rate
    Chemical Engineering Science, 2018
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Abstract Improper sizing of pipelines and proDuction tubings in the petroleum industry is often caused by lack of understanding of three-phase flow, which is characterized by gas flowing together with an immiscible water-oil mixture. There is the presence of a continuous liquid phase and a liquid dispersed phase, as observed in liquid-liquid flows, i.e., one can observe either a dispersion or emulsion of oil in water (o/w) or dispersion or emulsion of water in oil (w/o). The transition from o/w to w/o, or the other way around, is defined as phase-inversion. This phenomenon is characterized by a sharp increase in the pressure gradient, leading to significant pressure loss in the oil proDuction system. The goal is to investigate the effects of oil viscosity, channel geometry (circular pipe or Annular Duct) and superficial gas velocity on the phenomenon of phase inversion in vertical liquid-liquid-gas flows, using oil with three different viscosities (ranging from 70 mPa s to 280 mPa s), tap water and compressed air as working fluids. The experiments were carried out in three different geometries: (i) glass pipe of 50 mm i.d., (ii) glass pipe of 95 mm i.d. and (iii) Concentric Annular Duct with 95 mm of hydraulic diameter (glass outer pipe and PVC internal pipe). The experiments were performed under equivalent Reynolds number to evaluate the geometry effect. New data as total pressure gradient and volumetric fractions were obtained for all geometries. The results suggest that the extrapolation of results obtained in circular pipes with low viscosity oil and low gas flow rates to Annular-Duct flow with viscous oils and high gas flow rates can lead to significant errors.

  • Experimental study of multiphase flow in large Annular Duct
    Universidade de São Paulo, 2016
    Co-Authors: Alex Roger Almeida Colmanetti
    Abstract:

    Escoamentos gás-líquido assim como escoamento líquido-líquido-gás em duto de geometria anular estão presentes em muitas aplicações industriais, por exemplo, em poços de petróleo direcionais. No entanto, até mesmo características globais de escoamento gás-líquido nessa geometria, como os padrões de escoamento ou gradiente de pressão, não são ainda totalmente compreendidas. E ainda, informações são escassas quando se refere a escoamento trifásico nessa geometria, cuja aplicação está relacionada ao fenômeno de inversão de fase, que é de extrema importância não apenas para ao setor petrolífero, como para a indústria alimentícia. O presente estudo experimental tem como objetivo avaliar o escoamento líquido-gás, apresentar dados inéditos de escoamento gás-líquido para três viscosidades de óleo, além de avaliar o fenômeno de inversão de fase em escoamento ascendente vertical em duto anular de grande diâmetro. Um aparato experimental inclinável com 10,5 m de comprimento foi projetado e construído para este trabalho. As dimensões radiais do duto anular estão em escala real, conforme se verifica em poços de petróleo e gás. A investigação em escoamento gás-líquido foi conduzida utilizando água, óleo e ar comprimido como fluidos de trabalho em escoamento ascendente vertical em duas geometrias: (i) um tubo com diâmetro de 95 mm e (ii) um duto de configuração anular e concêntrico, com diâmetro hidráulico de valor igual ao diâmetro do tubo. A avaliação do fenômeno de inversão de fase em escoamento trifásico foi conduzida em condições equivalentes em três geometrias: (i) tubo vertical menor com diâmetro de 50 mm, (ii) tubo com diâmetro de 95 mm e (iii) um duto anular concêntrico. Padrões de escoamento, queda de pressão e fração volumétrica de fase foram obtidos para ambos os escoamentos gás-líquido e líquido-líquido-gás. Os dados coletados nesse trabalho são de grande importância para o desenvolvimento de novas correlações de fechamento, que são essenciais para o projeto otimizado de poços de petróleo. Dados inéditos de escoamento bifásico óleo-gás são apresentados, bem como um estudo pioneiro em inversão de fase em escoamento trifásico com velocidade superficial de gás e viscosidade do óleo elevadas.Two-phase flows as well as three-phase flow in Annular geometry are present in many industrial applications, for example in oil directional wells. However, even global characteristics of gas-liquid flow in this geometry, such as flow patterns and pressure gradient are not fully understood. Moreover, information is scarce when it refers to three-phase flow in this geometry, which application is related to the phase inversion phenomenon, which is of extreme importance and not only for the oil industry. This experimental study aims to evaluate the liquid-gas flow, present new data from gas-liquid flow for three oil viscosities and evaluate the phase inversion phenomenon in vertical upward flow in large diameter Annular Duct. An experimental apparatus with 10.5 m length was designed and built for this work. The radial dimensions of the Annular Duct are similar to full scale, as observed in oil and gas wells. The investigation into gas-liquid flow was conDucted using water, oil and compressed air as working fluids in an ascending vertical flow in two geometries: (i) a tube with 95 mm diameter and (ii) a Concentric Annular Duct with hydraulic diameter equivalent to the tube internal diameter. The evaluation of the phase inversion phenomenon in three-phase flow was conDucted under equivalent conditions for three geometries: (i) smaller vertical tube with 50 mm of internal diameter, (ii) tube with 95 mm of internal diameter and (iii) Concentric Annular Duct with hydraulic diameter of 95 mm. Flow patterns, pressure drop and volumetric phase fraction were obtained for both gas-liquid and gas-liquid-liquid flows. The data collected in this study are of great importance for the development of new closing correlations, which are essential for the optimized design of oil wells. New two-phase flow data for three oil viscosities, not found in the literature, are presented as well as a pioneer study in three-phase-flow phase inversion with high oil viscosity and high superficial gas velocity

Marcelo Souza De Castro - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Liquid Viscosity and Geometry on Vertical Gas/Liquid Two-Phase Annular-Duct Flow
    SPE Journal, 2020
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Summary Two-phase flow in large Annular Ducts is very common in industrial applications. Nevertheless, many two-phase-flow phenomena in such a geometry have not been fully understood. This article addresses an investigation on the effects of Duct geometry and liquid viscosity on vertical upward Annular-Duct two-phase flows. Compressed air and tap water or mineral oil were the working fluids. Three oil viscosity ranges were tested, from 30 to 400 mPa·s. A 10.0-m-long inclinable experimental setup was designed and built for the experiments conDucted in two equivalent geometries. The first is made of a 95-mm-inner-diameter circular pipe (called the reference pipe), and the second is a Concentric Annular Duct with 95-mm hydraulic diameter, the same diameter as the reference pipe. The radial geometries were similar to those observed in oil wells. Flow patterns, total pressure drop, and in-situ volumetric fractions were obtained. According to the results, the standard hydraulic diameter might not be appropriate for the modeling of vertical gas/liquid flow in large Annular Ducts.

  • phase inversion phenomena in vertical three phase flow experimental study on the influence of fluids viscosity Duct geometry and gas flow rate
    Chemical Engineering Science, 2018
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Abstract Improper sizing of pipelines and proDuction tubings in the petroleum industry is often caused by lack of understanding of three-phase flow, which is characterized by gas flowing together with an immiscible water-oil mixture. There is the presence of a continuous liquid phase and a liquid dispersed phase, as observed in liquid-liquid flows, i.e., one can observe either a dispersion or emulsion of oil in water (o/w) or dispersion or emulsion of water in oil (w/o). The transition from o/w to w/o, or the other way around, is defined as phase-inversion. This phenomenon is characterized by a sharp increase in the pressure gradient, leading to significant pressure loss in the oil proDuction system. The goal is to investigate the effects of oil viscosity, channel geometry (circular pipe or Annular Duct) and superficial gas velocity on the phenomenon of phase inversion in vertical liquid-liquid-gas flows, using oil with three different viscosities (ranging from 70 mPa s to 280 mPa s), tap water and compressed air as working fluids. The experiments were carried out in three different geometries: (i) glass pipe of 50 mm i.d., (ii) glass pipe of 95 mm i.d. and (iii) Concentric Annular Duct with 95 mm of hydraulic diameter (glass outer pipe and PVC internal pipe). The experiments were performed under equivalent Reynolds number to evaluate the geometry effect. New data as total pressure gradient and volumetric fractions were obtained for all geometries. The results suggest that the extrapolation of results obtained in circular pipes with low viscosity oil and low gas flow rates to Annular-Duct flow with viscous oils and high gas flow rates can lead to significant errors.

Marcel Cavallini Barbosa - One of the best experts on this subject based on the ideXlab platform.

  • Influence of Liquid Viscosity and Geometry on Vertical Gas/Liquid Two-Phase Annular-Duct Flow
    SPE Journal, 2020
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Summary Two-phase flow in large Annular Ducts is very common in industrial applications. Nevertheless, many two-phase-flow phenomena in such a geometry have not been fully understood. This article addresses an investigation on the effects of Duct geometry and liquid viscosity on vertical upward Annular-Duct two-phase flows. Compressed air and tap water or mineral oil were the working fluids. Three oil viscosity ranges were tested, from 30 to 400 mPa·s. A 10.0-m-long inclinable experimental setup was designed and built for the experiments conDucted in two equivalent geometries. The first is made of a 95-mm-inner-diameter circular pipe (called the reference pipe), and the second is a Concentric Annular Duct with 95-mm hydraulic diameter, the same diameter as the reference pipe. The radial geometries were similar to those observed in oil wells. Flow patterns, total pressure drop, and in-situ volumetric fractions were obtained. According to the results, the standard hydraulic diameter might not be appropriate for the modeling of vertical gas/liquid flow in large Annular Ducts.

  • phase inversion phenomena in vertical three phase flow experimental study on the influence of fluids viscosity Duct geometry and gas flow rate
    Chemical Engineering Science, 2018
    Co-Authors: Alex Roger Almeida Colmanetti, Marcelo Souza De Castro, Marcel Cavallini Barbosa, Oscar Mauricio Hernandez Rodriguez
    Abstract:

    Abstract Improper sizing of pipelines and proDuction tubings in the petroleum industry is often caused by lack of understanding of three-phase flow, which is characterized by gas flowing together with an immiscible water-oil mixture. There is the presence of a continuous liquid phase and a liquid dispersed phase, as observed in liquid-liquid flows, i.e., one can observe either a dispersion or emulsion of oil in water (o/w) or dispersion or emulsion of water in oil (w/o). The transition from o/w to w/o, or the other way around, is defined as phase-inversion. This phenomenon is characterized by a sharp increase in the pressure gradient, leading to significant pressure loss in the oil proDuction system. The goal is to investigate the effects of oil viscosity, channel geometry (circular pipe or Annular Duct) and superficial gas velocity on the phenomenon of phase inversion in vertical liquid-liquid-gas flows, using oil with three different viscosities (ranging from 70 mPa s to 280 mPa s), tap water and compressed air as working fluids. The experiments were carried out in three different geometries: (i) glass pipe of 50 mm i.d., (ii) glass pipe of 95 mm i.d. and (iii) Concentric Annular Duct with 95 mm of hydraulic diameter (glass outer pipe and PVC internal pipe). The experiments were performed under equivalent Reynolds number to evaluate the geometry effect. New data as total pressure gradient and volumetric fractions were obtained for all geometries. The results suggest that the extrapolation of results obtained in circular pipes with low viscosity oil and low gas flow rates to Annular-Duct flow with viscous oils and high gas flow rates can lead to significant errors.

Lauriat Guy - One of the best experts on this subject based on the ideXlab platform.

  • Direct numerical simulation of turbulent heat transfer in annuli: Effect of heat flux ratio
    'Elsevier BV', 2009
    Co-Authors: Ould-rouiss Meryem, Redjem Saad L., Lauriat Guy
    Abstract:

    International audienceFully developed turbulent flow and heat transfer in a Concentric Annular Duct is investigated for the first time by using a direct numerical simulation (DNS) with isoflux conditions imposed at both walls. The Reynolds number based on the half-width between inner and outer walls, δ=(r2-r1)/2, and the laminar maximum velocity is Reδ=3500. A Prandtl number Pr=0.71 and a radius ratio r∗=0.1 were retained. The main objective of this work is to examine the effect of the heat flux density ratio, q∗=q1/q2, on different thermal statistics (mean temperature profiles, root mean square (rms) of temperature fluctuations, turbulent heat fluxes, heat transfer, etc.). To validate the present DNS calculations, predictions of the flow and thermal fields with q∗=1 are compared to results recently reported in the archival literature. A good agreement with available DNS data is shown. The effect of heat flux ratio q∗ on turbulent thermal statistics in Annular Duct with arbitrarily prescribed heat flux is discussed then. This investigation highlights that heat flux ratio has a marked influence on the thermal field. When q∗ varies from 0 to 0.01, the rms of temperature fluctuations and the turbulent heat fluxes are more intense near the outer wall while changes in q∗ from 1 to 100, lead to opposite trends