UDF: Distance from the wall

August 14, 2002, 03:36

Dear All,

is it possible to determine the distance from the wall in Fluent UDF?

Greetings

Gabor

Thumper · August 14, 2002, 04:15

Yes. It's possible. UDF can access a centroid of face on a cell and access the cell centroid as well.

Then ,the distance from wall can be calculated by vector calculations.

Regards

Keil

August 14, 2002, 05:31

Thanks Keil.

Can a UDF-macro determine the coordinates of the nearest wall in complex geometry?

Regards

Gabor

August 15, 2002, 01:34

Yes. It can.

But the program will be a little bit complex.

Regards

Keil

Thumper · August 19, 2002, 01:26

Hi Gabor,

Try to use C_WALL_DIST(c,t) macro in UDF... I suppose it is what You need.

Michal

pratikddhoot · June 10, 2016, 14:52

Can you guide me how to?

zobekenobe · May 24, 2018, 07:27

you can also use BOUNDARY_FACE_GEOMETRY(f, thread, A, dr, es, A_by_es, dr0)

dr is the distance between the cell centroids of the adjacent cell to the wall and the wall

August 14, 2002, 03:36	UDF: Distance from the wall	#1
Gabor Guest Posts: n/a	Dear All, is it possible to determine the distance from the wall in Fluent UDF? Greetings Gabor

August 14, 2002, 04:15	Re: UDF: Distance from the wall	#2
Keil Guest Posts: n/a	Yes. It's possible. UDF can access a centroid of face on a cell and access the cell centroid as well. Then ,the distance from wall can be calculated by vector calculations. Regards Keil Thumper likes this.

August 14, 2002, 05:31	Re: UDF: Distance from the wall	#3
Gabor Guest Posts: n/a	Thanks Keil. Can a UDF-macro determine the coordinates of the nearest wall in complex geometry? Regards Gabor

August 15, 2002, 01:34	Re: UDF: Distance from the wall	#4
Keil Guest Posts: n/a	Yes. It can. But the program will be a little bit complex. Regards Keil

August 19, 2002, 01:26	Re: UDF: Distance from the wall	#5
Michal Guest Posts: n/a	Hi Gabor, Try to use C_WALL_DIST(c,t) macro in UDF... I suppose it is what You need. Michal Thumper likes this.

June 10, 2016, 14:52		#6
pratikddhoot New Member Pratik Dhoot Join Date: Mar 2016 Location: Boston, MA Posts: 20 Rep Power: 10	Can you guide me how to?

May 24, 2018, 07:27		#7
zobekenobe Member zobekenobe Join Date: Mar 2009 Location: Dublin, Ireland Posts: 72 Rep Power: 17	you can also use BOUNDARY_FACE_GEOMETRY(f, thread, A, dr, es, A_by_es, dr0) dr is the distance between the cell centroids of the adjacent cell to the wall and the wall

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