CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT > Fluent Multiphase

How to maintain air at a constant pressure in multiphase flows?

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Search this Thread Display Modes
Old   June 18, 2022, 10:13
Default How to maintain air at a constant pressure in multiphase flows?
New Member
Join Date: Jun 2022
Posts: 1
Rep Power: 0
Tutun2507 is on a distinguished road
I am trying to reproduce the results given in a paper in Ansys Fluent using VOF model - it is basically a gravity-driven flow of a thin liquid film over an inclined plane. The inclined plane is hydrophobic in nature and is ribbed and contains grooves filled with air. The air above the liquid film as well as the air trapped in the grooves are both at a constant pressure of 1 atm.

I started the simulation by patching a desired height with the liquid film above the groove with air filling up the groove. Initially at t=0, the liquid-gas interface is flat. The initial pressure in the entire domain is 1 atm. According to the paper, the liquid-air interface should curve downwards. Unfortunately, when I start running the transient simulation, the pressure in the air in the groove starts increasing and due to the Laplace pressure difference, the interface curves upwards.

So my question is: Is there any way to keep the pressure in the air constant throughout the entire length of the transient simulation?
Attached Images
File Type: png Schematic Diagram.PNG (137.1 KB, 2 views)
Tutun2507 is offline   Reply With Quote


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Supersonic 2D Ramp Air Intake Outlet Back Pressure BarisBicakci SU2 4 February 5, 2022 19:08
decomposePar problem: Cell 0contains face labels out of range vaina74 OpenFOAM Pre-Processing 37 July 20, 2020 06:38
static vs. total pressure auf dem feld FLUENT 17 February 26, 2016 14:04
Neumann pressure BC and velocity field Antech Main CFD Forum 0 April 25, 2006 03:15
Hydrostatic pressure in 2-phase flow modeling (long) DS & HB Main CFD Forum 0 January 8, 2000 16:00

All times are GMT -4. The time now is 09:11.