CFD Analysis of Two Phase Flow in a Horizontal Pipe – Prediction of Pressure Drop
In designing of condensers, the prediction of pressure
drop is as important as the prediction of heat transfer coefficient.
Modeling of two phase flow, particularly liquid – vapor flow under
diabatic conditions inside a horizontal tube using CFD analysis is
difficult with the available two phase models in FLUENT due to
continuously changing flow patterns. In the present analysis, CFD
analysis of two phase flow of refrigerants inside a horizontal tube of
inner diameter, 0.0085 m and 1.2 m length is carried out using
homogeneous model under adiabatic conditions. The refrigerants
considered are R22, R134a and R407C. The analysis is performed at
different saturation temperatures and at different flow rates to
evaluate the local frictional pressure drop. Using Homogeneous
model, average properties are obtained for each of the refrigerants
that is considered as single phase pseudo fluid. The so obtained
pressure drop data is compared with the separated flow models
available in literature.
[1] John G. Collier, Convective Boiling and Condensation. Mc Graw Hill,
1972. ch.2.
[2] C. Tribbe, H. Muller-Steinhagen, An evaluation of the performance of
phenomenological models for predicting pressure gradient during gasliquid
flow in horizontal pipelines, Int. J. Multiphase Flow. Vol.26,
2000, pp. 1019-1036.
[3] H. Muller-Steinhagen, K. Heck, A simple friction pressure drop
correlation for two-phase flow in pipes, Chem. Eng. Process, vol. 20 ,
1986, pp. 297-308.
[4] Engineering Data Book III, Wolverine Tube Inc., Revised in 2006.
ch.13.
[5] M.B. Ould-Didi, N. Kattan, J.R. Thome, Prediction of two phase
pressure gradients of refrigerants in horizontal tubes, Int. J.
Refrigeration. Vol. 25, 2002, pp.935-947.
[6] J. Moreno Quibe'n, J.R. Thome, Flow pattern based two-phase frictional
pressure drop model for horizontal tubes, Part I: Diabatic and adiabatic
experimental study, Int. J. Heat Fluid Flow, vol.28, Issue. 5,2007, pp.
1049-1059.
[7] J. Moreno Quibe'n, J.R. Thome, Flow pattern based two-phase
Frictional pressure drop model for horizontal tubes, part II: New
phenomenological model, Int. J. Heat Fluid Flow, vol.28, Issue.5, 2007,
pp. 1060-1072.
[8] L. Wojtan, T. Ursenbacher, J.R. Thome, Investigation of flow boiling in
horizontal tubes: part I e a new diabatic two phase flow pattern map, Int.
J. Heat Mass Transfer. Vol. 48, 2005, pp. 2955-2969.
[1] John G. Collier, Convective Boiling and Condensation. Mc Graw Hill,
1972. ch.2.
[2] C. Tribbe, H. Muller-Steinhagen, An evaluation of the performance of
phenomenological models for predicting pressure gradient during gasliquid
flow in horizontal pipelines, Int. J. Multiphase Flow. Vol.26,
2000, pp. 1019-1036.
[3] H. Muller-Steinhagen, K. Heck, A simple friction pressure drop
correlation for two-phase flow in pipes, Chem. Eng. Process, vol. 20 ,
1986, pp. 297-308.
[4] Engineering Data Book III, Wolverine Tube Inc., Revised in 2006.
ch.13.
[5] M.B. Ould-Didi, N. Kattan, J.R. Thome, Prediction of two phase
pressure gradients of refrigerants in horizontal tubes, Int. J.
Refrigeration. Vol. 25, 2002, pp.935-947.
[6] J. Moreno Quibe'n, J.R. Thome, Flow pattern based two-phase frictional
pressure drop model for horizontal tubes, Part I: Diabatic and adiabatic
experimental study, Int. J. Heat Fluid Flow, vol.28, Issue. 5,2007, pp.
1049-1059.
[7] J. Moreno Quibe'n, J.R. Thome, Flow pattern based two-phase
Frictional pressure drop model for horizontal tubes, part II: New
phenomenological model, Int. J. Heat Fluid Flow, vol.28, Issue.5, 2007,
pp. 1060-1072.
[8] L. Wojtan, T. Ursenbacher, J.R. Thome, Investigation of flow boiling in
horizontal tubes: part I e a new diabatic two phase flow pattern map, Int.
J. Heat Mass Transfer. Vol. 48, 2005, pp. 2955-2969.
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:56397", author = "P. Bhramara and V. D. Rao and K. V. Sharma and T. K. K. Reddy", title = "CFD Analysis of Two Phase Flow in a Horizontal Pipe – Prediction of Pressure Drop", abstract = "In designing of condensers, the prediction of pressure
drop is as important as the prediction of heat transfer coefficient.
Modeling of two phase flow, particularly liquid – vapor flow under
diabatic conditions inside a horizontal tube using CFD analysis is
difficult with the available two phase models in FLUENT due to
continuously changing flow patterns. In the present analysis, CFD
analysis of two phase flow of refrigerants inside a horizontal tube of
inner diameter, 0.0085 m and 1.2 m length is carried out using
homogeneous model under adiabatic conditions. The refrigerants
considered are R22, R134a and R407C. The analysis is performed at
different saturation temperatures and at different flow rates to
evaluate the local frictional pressure drop. Using Homogeneous
model, average properties are obtained for each of the refrigerants
that is considered as single phase pseudo fluid. The so obtained
pressure drop data is compared with the separated flow models
available in literature.", keywords = "Adiabatic conditions, CFD analysis, Homogeneousmodel and Liquid – Vapor flow.", volume = "2", number = "4", pages = "470-7", }