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

UDS boundary for pressure-out

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

LinkBack Thread Tools Search this Thread Display Modes
Old   May 23, 2018, 10:00
Default UDS boundary for pressure-out
New Member
Join Date: Feb 2018
Posts: 12
Rep Power: 8
Lee 小亢 is on a distinguished road
Hi~every one,
I found a problems in my work and want to discuss with you. I calculated a uds in my case so I need to set the boundary condition for my outlet. Tne quesition is how I set the boundary condition? Here are two ways to set the boundary condition:specified flux and specified value...I am confused about it. Is the value of UDS at the outlet I am going to calculate? Why I need set it?
Lee 小亢 is offline   Reply With Quote

Old   May 23, 2018, 20:58
Senior Member
Join Date: Apr 2013
Posts: 2,363
Rep Power: 34
AlexanderZ will become famous soon enoughAlexanderZ will become famous soon enough
yes, that is the value of your UDS (if you use fixed value option)
to calculate UDS you must define source and boundary condition, to get the distribution field in domain.

Let suppose, you have source and only flux = 0 everywhere, in that case you UDS may get any value

I hope this will help you

best regards
AlexanderZ is offline   Reply With Quote

Old   May 24, 2018, 06:56
New Member
Join Date: Feb 2018
Posts: 12
Rep Power: 8
Lee 小亢 is on a distinguished road
thanks AlexanderZ, I konw what you means. But I want to ask a question like this: If there is one inlet and one outlet in my geometry.Fluid material is liquid. The UDS transport equation includes transient term(by default), source term (user defined ) , Convective term(flux function is mass flow rate) and diffusion term (I defined the diffusion coefficient). I set the fix value of the UDS at the inlet.All the other boundary condition is standard wall and UDS bondary condition is fix value of 0. I mean this condition I need set the bondary condition for the UDS at the outlet? Isn't it computering by the transport equation?
best wishes
Lee 小亢 is offline   Reply With Quote


boundary condition, outlet, uds

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
Foam::error::PrintStack almir OpenFOAM Running, Solving & CFD 92 May 21, 2024 07:56
3D Windturbine simulation in SU2 k.vimalakanthan SU2 15 October 12, 2023 05:53
CFD analaysis of Pelton turbine amodpanthee CFX 31 April 19, 2018 18:02
Waterwheel shaped turbine inside a pipe simulation problem mshahed91 CFX 3 January 10, 2015 11:19
Question about heat transfer coefficient setting for CFX Anna Tian CFX 1 June 16, 2013 06:28

All times are GMT -4. The time now is 11:55.