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Showing results 1 to 7 of 7 Search took 0.00 seconds. Search: Posts Made By: DoHander

Forum: FLUENT June 17, 2010, 18:02

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander Here is a slightly better approximation: ... Here is a slightly better approximation: http://en.wikipedia.org/wiki/Error_function Do

Forum: FLUENT June 17, 2010, 18:01

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander You use a very crude approximation for erf, you... You use a very crude approximation for erf, you will get about 10^-1 error if you use (1-exp(x)) instead of the actual erf. The good thing is that if you were capable to compile your code using...

Forum: FLUENT June 17, 2010, 17:46

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander It depends of your Linux system, but yes it is... It depends of your Linux system, but yes it is possible to not have a C compiler installed. What you can do is to give a search on all your system after math.h (probably it is in /usr/... but...

Forum: FLUENT June 17, 2010, 17:39

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander /* UDF for specifying a transient inlet velocity... /* UDF for specifying a transient inlet velocity profile boundary condition */ #include "udf.h" #include <math.h> #define PI 4.*atan(1.) #define RT 0.00183 real VM=21.911; real VNin=0.01; ...

Forum: FLUENT June 17, 2010, 17:37

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander Hey, try the same code but with: ... Hey, try the same code but with: #include <math.h> instead of: #include "math.h"

Forum: FLUENT June 17, 2010, 17:35

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander I would recommend you to use a good book like: ... I would recommend you to use a good book like: ...

Forum: FLUENT June 17, 2010, 17:24

Replies: 13 Urgent! UDF error "implicit declaration of function" Views: 2,634 Posted By DoHander I suppose you are on a Windows system ? If yes... I suppose you are on a Windows system ? If yes the erf function is not implemented in math.h :) . So basically you will need to implement a custom version of erf in your UDF function. If you are...

Showing results 1 to 7 of 7

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