velocity profile as boundary condition

MK. · October 30, 2014, 10:09

Hi,

I would like to implement a velocity profile at the inlet boundary patch. The reason why it is not working with timeVaryingMappedFixedValue is that my velocity profile depends on z. So the flow direction would be x and therefore is z coordinate perpendicular to x.

For example:

points velocity profile:

(0 0 0) (1.0 0 0)
(0 0 1) (2.0 0 0)

(0 1 3) (1.0 0 0)
(0 1 4) (2.0 0 0)

(0 2 2) (1.0 0 0)
(0 2 3) (2.0 0 0)

That is just an example since my inlet patch is quite large. How can I implement such a velocity profile as boundary condition? I hope you know what I mean.

cheers,

MK

blacksquirrel · October 30, 2014, 11:39

My first suggestion would be to look into groovyBC, especially if you can describe your profile with a function U(x,y,z).

MK. · November 11, 2014, 03:08

Hi,

thank you very much! I cann't describe the shape of the terrain with a function. Therefore I used more than two data profiles for the timeVaryingMappedFixedValue boundary condition. It takes a while to implement the data but the result of the simulation is good.

October 30, 2014, 10:09	velocity profile as boundary condition	#1
MK. New Member MK Join Date: Oct 2014 Posts: 6 Rep Power: 12	Hi, I would like to implement a velocity profile at the inlet boundary patch. The reason why it is not working with timeVaryingMappedFixedValue is that my velocity profile depends on z. So the flow direction would be x and therefore is z coordinate perpendicular to x. For example: points velocity profile: (0 0 0) (1.0 0 0) (0 0 1) (2.0 0 0) (0 1 3) (1.0 0 0) (0 1 4) (2.0 0 0) (0 2 2) (1.0 0 0) (0 2 3) (2.0 0 0) That is just an example since my inlet patch is quite large. How can I implement such a velocity profile as boundary condition? I hope you know what I mean. cheers, MK

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October 30, 2014, 11:39		#2
blacksquirrel Member Join Date: Jun 2011 Posts: 53 Rep Power: 15	My first suggestion would be to look into groovyBC, especially if you can describe your profile with a function U(x,y,z).

November 11, 2014, 03:08		#3
MK. New Member MK Join Date: Oct 2014 Posts: 6 Rep Power: 12	Hi, thank you very much! I cann't describe the shape of the terrain with a function. Therefore I used more than two data profiles for the timeVaryingMappedFixedValue boundary condition. It takes a while to implement the data but the result of the simulation is good.