How to change value of a variable in exterior cells in parallel computation

hb12 · November 29, 2015, 15:59

Hi ,

In parallel computing I tried to change value of a variable (for example a pressure or a UDM) in exterior cells of a partition. Nevertheless, information of exterior cells is accessible (like faces, nodes, etc), the value of the variable or UDM does not change. I used different macros.

Generally, is it possible to change values in cells of other partitions adjacent to the current partition?

I have to work with parallel option because of large number of cells.

Allen_ayt · August 20, 2019, 04:34

Hi!
I have came across the same problem. I'm wondering if you have solved it?
Thank you!

AlexanderZ · August 20, 2019, 05:10

Ansys Fluent Customization manual
look for begin_f_loop_ext

best regards

vincenzolights · December 16, 2020, 03:24

Hello,
Has someone solved this problem? I need to write UDM of the exterior cell of one partition in the corresponding interior cell of another computational node. I know that partitions can exchange messages parallelizing UDF but it is tricky for my problem when I need to exchange continuously information between the exterior cell and adjacent one of the same node ID.

November 29, 2015, 15:59	How to change value of a variable in exterior cells in parallel computation	#1
hb12 New Member HBarati Join Date: Nov 2014 Posts: 3 Rep Power: 12	Hi , In parallel computing I tried to change value of a variable (for example a pressure or a UDM) in exterior cells of a partition. Nevertheless, information of exterior cells is accessible (like faces, nodes, etc), the value of the variable or UDM does not change. I used different macros. Generally, is it possible to change values in cells of other partitions adjacent to the current partition? I have to work with parallel option because of large number of cells. Wang Changjun and Allen_ayt like this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Any Procedure to setup parallel computation??	fluidmechanics	SU2 Installation	10	July 21, 2017 05:31
parallel computation with PBS error	tsevine	SU2	4	July 4, 2014 07:21
parallel computation using v2.0.8	mistuning	SU2	1	November 21, 2013 12:01
MPI and parallel computation	Wang	Main CFD Forum	4	April 3, 2005 07:40
Parallel computation problem in Tascflow	dandy	CFX	3	April 21, 2002 01:32

August 20, 2019, 04:34		#2
Allen_ayt New Member Join Date: Aug 2019 Posts: 6 Rep Power: 7	Hi! I have came across the same problem. I'm wondering if you have solved it? Thank you!

August 20, 2019, 05:10		#3
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	Ansys Fluent Customization manual look for begin_f_loop_ext best regards

December 16, 2020, 03:24		#4
vincenzolights New Member Vincenzo Luci Join Date: Jan 2019 Posts: 9 Rep Power: 7	Hello, Has someone solved this problem? I need to write UDM of the exterior cell of one partition in the corresponding interior cell of another computational node. I know that partitions can exchange messages parallelizing UDF but it is tricky for my problem when I need to exchange continuously information between the exterior cell and adjacent one of the same node ID.