contributor author | M. Lopez de Bertodano | |
contributor author | S.-J. Lee | |
contributor author | R. T. Lahey | |
contributor author | D. A. Drew | |
date accessioned | 2017-05-08T23:33:01Z | |
date available | 2017-05-08T23:33:01Z | |
date copyright | March, 1990 | |
date issued | 1990 | |
identifier issn | 0098-2202 | |
identifier other | JFEGA4-27047#107_1.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl/handle/yetl/107132 | |
description abstract | The void fraction distribution for turbulent bubbly air/water upflows and downflows in a pipe was analyzed using a three-dimensional two-fluid model. A τ − ε (i.e., Reynolds stress) turbulence model was used for the continuous (liquid) phase. The τ − ε transport equations yield all components of the Reynolds stress tensor for the liquid phase momentum equations. The effect of these stresses is to create a lateral pressure gradient that acts on the bubbles and effects their distribution. The lateral lift force on the bubbles has also been modelled. This lift force arises due to the relative motion of the bubble with respect to a nonuniform liquid velocity field. It has been observed experimentally that for upflows the bubbles concentrate near the wall while for downflows they move toward the center of the conduit. The model presented herein predicts these trends. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | The Prediction of Two-Phase Turbulence and Phase Distribution Phenomena Using a Reynolds Stress Model | |
type | Journal Paper | |
journal volume | 112 | |
journal issue | 1 | |
journal title | Journal of Fluids Engineering | |
identifier doi | 10.1115/1.2909357 | |
journal fristpage | 107 | |
journal lastpage | 113 | |
identifier eissn | 1528-901X | |
keywords | Turbulence | |
keywords | Stress | |
keywords | Bubbles | |
keywords | Lift (Fluid dynamics) | |
keywords | Equations | |
keywords | Porosity | |
keywords | Pressure gradient | |
keywords | Stress tensors | |
keywords | Water | |
keywords | Momentum | |
keywords | Fluids | |
keywords | Motion AND Pipes | |
tree | Journal of Fluids Engineering:;1990:;volume( 112 ):;issue: 001 | |
contenttype | Fulltext | |