CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

Complex velocity boundary condition

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

LinkBack Thread Tools Search this Thread Display Modes
Old   October 2, 2019, 01:17
Default Complex velocity boundary condition
Join Date: Apr 2019
Location: India
Posts: 56
Rep Power: 3
Pavithra is on a distinguished road
Hello Everyone,

I want to implement the following boundary condition on the horizontal walls of a 2-D square cavity.

\beta \frac{du_x}{dy} = (1-\beta)u_x

u_y = 0

The value of \beta varies from 0 to 1 in steps of 0.25.

I understand that when \beta = 0, the boundary condition becomes u_x = 0 and u_y = 0.

Also, when \beta = 1, the boundary condition becomes \frac{du_x}{dy} = 0 and u_y = 0.

I am able to achieve the above two cases using directionMixed boundary condition.

But I am unable to figure out how to set the boundary condition when \beta takes a value such as 0.25, 0.5 or 0.75.

For instance, when \beta = 0.25, it becomes \frac{du_x}{dy}=3u_x.

Kindly please give me some directions to implement this boundary condition.

Thank You.

With Thanks
Pavithra is offline   Reply With Quote


boundary condition, directionmixed bc, openfoam, velocity components

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
The method on dealing with velocity in static pressure outlet boundary condition CFX 2 September 30, 2017 02:33
Massflow or average velocity boundary condition Sideshore OpenFOAM Pre-Processing 6 September 27, 2016 16:09
Problem in setting Boundary Condition Madhatter92 CFX 12 January 12, 2016 05:39
Boundary condition of velocity and pressure at interface for air water pipe flow jignesh_thaker2007 OpenFOAM Running, Solving & CFD 0 June 10, 2014 17:42
Question about heat transfer coefficient setting for CFX Anna Tian CFX 1 June 16, 2013 07:28

All times are GMT -4. The time now is 05:30.