CFD Online Logo CFD Online URL
Home > Forums > FLUENT

Modelling a River flow

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

LinkBack Thread Tools Display Modes
Old   May 26, 2014, 12:46
Default Modelling a River flow
New Member
anup radhakrishnan
Join Date: Jan 2014
Posts: 20
Rep Power: 6
anuprdk is on a distinguished road
Hello everyone,

my problem looks kind of simple. I want to simulate the flow in a section of a river and see how the free surface behaves based on the water speed. I have a number of queries pertaining to the same.

a) Should I have separate inlets for air and water and use velocity inlet as the boundary condition? I do not want the air to move about.
b) Do I need to use VOF method for this? If so, should the boundary condition at inlet be mass flow ? And do I need two separate inlets?
c) What about the hydrostatic pressure? Is it related to the position of the reference pressure? And where do I specify it?

The reason why I have combined all these questions is that I have tried a number of cases with different boundary conditions and initializations but all in vain.

d) When we initialize the flow, I only want the water to have the initial speed and not the air. Which boundary should I opt under 'Compute From'?

e) The volume of fraction is defined as zero in the initialization page. I do the patching for the water region and set the volume fraction as 1. Is this the right approach?

f) If I need to initialize the water flow alone should I patch the velocity under 'Registers to patch' or 'Zones to patch'

I just wanted to make the problem very clear, hence the long question.

Please advise as I have been stuck on this for nearly a month!

Thanks a lot

anuprdk is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
kOmegaSST without turbulence modelling of the flow around geometry CFDnewbie147 OpenFOAM Running, Solving & CFD 7 December 5, 2013 08:29
Question Regarding Modelling Internal Flow Alteran CFX 1 September 4, 2013 12:07
Advice on multi-phase flow modelling Martin Main CFD Forum 3 October 14, 2008 05:16
modelling blood flow in arteries with starcd sara Siemens 5 April 10, 2007 09:17
problem of river flow simulation Liu Main CFD Forum 0 May 27, 2004 22:01

All times are GMT -4. The time now is 06:15.