boundary with velocity distribution

cfd123 · February 17, 2010, 03:27

Hi,

does anyone know if/how it is possible to use velocity distributions (e.g. from measurements) as velocity boundary condition in Flow-3D.

I could only find how to vary the velocity in time but not using different velocities at different locations of the boundary.

thanks a lot in advance

Ghirghidov · February 17, 2010, 05:59

Hi there. By different blocks?

Regards.

cfd123 · February 17, 2010, 07:51

Hi,
I guess it will take many blocks and then slows down the simulation.
The idea is, in case of a reservoir and a spillway, that you can use some measurements in the reservoir as boundary condition, so it is not necessary to model the whole reservoir.
Maybe it is possible to edit the input file and give the coordiantes and the velocities?
Has this been done by someone?
regards

Ghirghidov · February 17, 2010, 09:44

Hi there.

As I know you could use planes or points to input different velocities but unfortunately I can't tell you how. I am going to master this.

Regards.

February 17, 2010, 03:27	boundary with velocity distribution	#1
cfd123 New Member anonymous Join Date: Feb 2010 Posts: 2 Rep Power: 0	Hi, does anyone know if/how it is possible to use velocity distributions (e.g. from measurements) as velocity boundary condition in Flow-3D. I could only find how to vary the velocity in time but not using different velocities at different locations of the boundary. thanks a lot in advance

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February 17, 2010, 05:59		#2
Ghirghidov Member Armen A. Ghirghidov Join Date: Mar 2009 Posts: 50 Rep Power: 17	Hi there. By different blocks? Regards.

February 17, 2010, 07:51		#3
cfd123 New Member anonymous Join Date: Feb 2010 Posts: 2 Rep Power: 0	Hi, I guess it will take many blocks and then slows down the simulation. The idea is, in case of a reservoir and a spillway, that you can use some measurements in the reservoir as boundary condition, so it is not necessary to model the whole reservoir. Maybe it is possible to edit the input file and give the coordiantes and the velocities? Has this been done by someone? regards

February 17, 2010, 09:44		#4
Ghirghidov Member Armen A. Ghirghidov Join Date: Mar 2009 Posts: 50 Rep Power: 17	Hi there. As I know you could use planes or points to input different velocities but unfortunately I can't tell you how. I am going to master this. Regards.