pressure time history of some nodes

ibuki · January 27, 2010, 14:29

Hello. I'm running a 2D transient model, and I would like to know if there is a way to write an output of pressure time history of certain nodes.
Thank you.

DoHander · January 27, 2010, 16:59

Yes, it is possible. Define a surface that pass through your nodes and then write a Scheme or a UDF function that will save the data at every iteration or time step.

Do

ibuki · January 28, 2010, 06:35

Thank you for the reply. I have never used UDFs, and I've been reading the manual about UDF and Scheme. I know that I have to write UDF using C code, but I don't have much idea of what exactly I have to do. Would you give me a little example of this case to print pressure of some nodes along a surface every X time steps? Thank you very much.

DoHander · January 28, 2010, 17:14

This will save the pressure coefficient from a zone named "zone_name" at each time step in files named data-0000.txt data-0001.txt ....

(cx-macro-define
'((save-data . "file/write-profile\ndata-%t.txt\nzone_name\n\npressure-coefficient\nq\n")
))

January 27, 2010, 14:29	pressure time history of some nodes	#1
ibuki New Member ibuki kusano Join Date: Mar 2009 Location: Spain Posts: 10 Rep Power: 17	Hello. I'm running a 2D transient model, and I would like to know if there is a way to write an output of pressure time history of certain nodes. Thank you.

January 28, 2010, 06:35	UDFs	#3
ibuki New Member ibuki kusano Join Date: Mar 2009 Location: Spain Posts: 10 Rep Power: 17	Thank you for the reply. I have never used UDFs, and I've been reading the manual about UDF and Scheme. I know that I have to write UDF using C code, but I don't have much idea of what exactly I have to do. Would you give me a little example of this case to print pressure of some nodes along a surface every X time steps? Thank you very much.

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January 27, 2010, 16:59		#2
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 19	Yes, it is possible. Define a surface that pass through your nodes and then write a Scheme or a UDF function that will save the data at every iteration or time step. Do

January 28, 2010, 17:14		#4
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 19	This will save the pressure coefficient from a zone named "zone_name" at each time step in files named data-0000.txt data-0001.txt .... (cx-macro-define '((save-data . "file/write-profile\ndata-%t.txt\nzone_name\n\npressure-coefficient\nq\n") ))