How to set velocity

ivanyao · July 5, 2008, 03:59

hi,
I am doing a simulation,it is about the wind pressure on the building.there is a problem to set the velocity of the wind.It is ok to set the velocity by a exactly value,such as 5m/s,8m/s.but the fact is the velocity of wind is change by the height,such as 0.2Z(Z is the height of the building.)and I don't know how to fix it. I am very appreciate if someone can help me.thanks.and I am doing the simulation in turbFoam,

msrinath80 · July 5, 2008, 13:27

You have some options for this situation:

1. Write your own utility
2. Use funkySetFields (is this possible?)
3. Modify the setParabolicInlet utility to give a linear variation in velocity with increasing height.

Please search the forum for posts on funkySetFields and the parabolic inlet.

ivanyao · July 7, 2008, 21:45

hello,
i am very ppreciate that you give me a hint.but I CAN'T find the file "setParabolicInlet".also the "funkySetFields".I AM a fresher for OP.

podallaire · July 7, 2008, 21:49

http://openfoamwiki.net/index.php/Co...funkySetFields

Enjoy !

July 5, 2008, 03:59	hi, I am doing a simulation,	#1
ivanyao Senior Member weihong yao Join Date: Mar 2009 Posts: 117 Rep Power: 17	hi, I am doing a simulation,it is about the wind pressure on the building.there is a problem to set the velocity of the wind.It is ok to set the velocity by a exactly value,such as 5m/s,8m/s.but the fact is the velocity of wind is change by the height,such as 0.2Z(Z is the height of the building.)and I don't know how to fix it. I am very appreciate if someone can help me.thanks.and I am doing the simulation in turbFoam,

July 5, 2008, 13:27	You have some options for this	#2
msrinath80 Senior Member Srinath Madhavan (a.k.a pUl\|) Join Date: Mar 2009 Location: Edmonton, AB, Canada Posts: 703 Rep Power: 21	You have some options for this situation: 1. Write your own utility 2. Use funkySetFields (is this possible?) 3. Modify the setParabolicInlet utility to give a linear variation in velocity with increasing height. Please search the forum for posts on funkySetFields and the parabolic inlet.

July 7, 2008, 21:45	hello, i am very ppreciate th	#3
ivanyao Senior Member weihong yao Join Date: Mar 2009 Posts: 117 Rep Power: 17	hello, i am very ppreciate that you give me a hint.but I CAN'T find the file "setParabolicInlet".also the "funkySetFields".I AM a fresher for OP.

July 7, 2008, 21:49	http://openfoamwiki.net/index.	#4
podallaire Senior Member Pierre-Olivier Dallaire Join Date: Mar 2009 Location: Montreal, Quebec, Canada Posts: 192 Rep Power: 17	http://openfoamwiki.net/index.php/Co...funkySetFields Enjoy !

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