The development of interfacial drag and non-drag laws for stratified wavy flow using PHASTA-2I
Abstract
A wavy stratified flow pattern is characterized by the separation of the liquid and gas flows, with the liquid moving downstream along the bottom of the horizontal conduit and the gas flowing concurrently above it. Analytical methods based on ensemble averaging techniques enable us to derive functional forms for various interfacial forces. Namely, the drag and non-drag forces ( e.g., virtual mass , lift , etc.). The resultant functional forms are not restricted to the stratified flow regime and can be generalized for other flow regimes . The derived analytical forms are compared against numerically-averaged results. The numerical simulation of the wavy stratified flow case was done using an adaptive finite element method (FEM) code. The comparisons showed good agreement. This method appears to have the potential to enable the evaluation of the constitutive relations for other multiphase flow regimes of interest.
- Publication:
-
APS Division of Fluid Dynamics Meeting Abstracts
- Pub Date:
- November 2003
- Bibcode:
- 2003APS..DFD.MN006G