[rahulmule797@gmail.com]

Hello everyone,
i did the udf programming before but that was for serial mode. and i'm new to this parallel programming and bit confused about what to solve on host and what on node.
i've written a program for unsteady temperature profile is it correct or what changes should i make further ?
please guide.

/************************************************** ************************************************** ************************************************** ***/

#include "udf.h"


DEFINE_PROFILE(unsteady_temp, thread, position)
{
#if !RP_HOST /* Compile this section for computing processes only (serial
and node) since these variables are not available
on the host */
real x[ND_ND];
face_t f;
real t = CURRENT_TIME;

begin_f_loop(f, thread)
{
F_CENTROID(x,f,thread);
F_PROFILE(f, thread, position) = 6.61e-21*t*t*t*t*t-8.33e-18*t*t*t*t+1.5e-14*t*t*t+3.071e-08*t*t-7.518e-04*t+307.05;
}
end_f_loop(f, thread)
#endif /* !RP_HOST */
}

if i use this same program as above will it work fine for parallel solver?
thanks in advance.

[AlexanderZ]

this code doesn't require additional directives like #if !RP_HOST to work in parallel,
you may remove it and run your UDF in serial/parallel

[rahulmule797@gmail.com]

Originally Posted by AlexanderZ

this code doesn't require additional directives like #if !RP_HOST to work in parallel,
you may remove it and run your UDF in serial/parallel

i tried to compile udf by removing directives but it is throwing this error.

# Generating udf_names.c because of makefile unsteady_temp.C
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj unsteady_temp.C
Microsoft (R) Incremental Linker Version 14.10.25019.0
Copyright (C) Microsoft Corporation. All rights reserved.

LINK : fatal error LNK1181: cannot open input file 'unsteady_temp.C'
Creating user_nt.udf file for 2ddp_node ...
(system "copy "C:\PROGRA~1\ANSYSI~1\v190\fluent"\fluent19.0.0\sr c\udf\makefile_nt.udf "libudf\win64\2ddp_node\makefile" ")
1 file(s) copied.
(chdir "libudf")(chdir "win64\2ddp_node")# Generating ud_io1.h
unsteady_temp.C

[pakk]

And with serial you did not get this error?

[rahulmule797@gmail.com]

Originally Posted by pakk

And with serial you did not get this error?

due to the above mentioned error it was not building the udf library.
Actually previously i tried with interpreting the udf..

[rahulmule797@gmail.com]

Originally Posted by rahulmule797@gmail.com

i tried to compile udf by removing directives but it is throwing this error.

# Generating udf_names.c because of makefile unsteady_temp.C
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj unsteady_temp.C
Microsoft (R) Incremental Linker Version 14.10.25019.0
Copyright (C) Microsoft Corporation. All rights reserved.

LINK : fatal error LNK1181: cannot open input file 'unsteady_temp.C'
Creating user_nt.udf file for 2ddp_node ...
(system "copy "C:\PROGRA~1\ANSYSI~1\v190\fluent"\fluent19.0.0\sr c\udf\makefile_nt.udf "libudf\win64\2ddp_node\makefile" ")
1 file(s) copied.
(chdir "libudf")(chdir "win64\2ddp_node")# Generating ud_io1.h
unsteady_temp.C

/************************************************** ************************************************** *********/
this error is resolved just by renaming UDF from "unsteady_temp.C" to "unsteady_temp.c".