SMALL value

C.C · October 31, 2013, 10:58

Hello,

Anyone knows the value of the variable SMALL in fluent? I've written in my UDF #define SMALL 1.e-30; but when interpreted it just happeared a warming saying that SMALL already exists and it will be changed. I had looked at the fluent's manuals but I didn't find anything...Thank you.

sbaffini · November 1, 2013, 03:31

If you have a Linux installation you can go in:

/somefolder/ansys_inc/v*/fluent/fluent?/src

(where * and ? are relative to specific versions) and do:

grep -i -n "#define SMALL " *

which will tell you that SMALL is defined as 1e-10 in f_wall.h at the line 207 (in Fluent 14.5).

Why don't you just use mySMALL?

C.C · November 1, 2013, 05:07

Hello sbaffini,

Thank you! Your answer helps me. Probably I'll use a different SMALL value from that of fluent.
Best regards,

CC

October 31, 2013, 10:58	SMALL value	#1
C.C Member CC Join Date: Jun 2011 Posts: 73 Rep Power: 14	Hello, Anyone knows the value of the variable SMALL in fluent? I've written in my UDF #define SMALL 1.e-30; but when interpreted it just happeared a warming saying that SMALL already exists and it will be changed. I had looked at the fluent's manuals but I didn't find anything...Thank you.

November 1, 2013, 03:31		#2
sbaffini Senior Member Paolo Lampitella Join Date: Mar 2009 Location: Italy Posts: 2,151 Blog Entries: 29 Rep Power: 39	If you have a Linux installation you can go in: /somefolder/ansys_inc/v/fluent/fluent?/src (where and ? are relative to specific versions) and do: grep -i -n "#define SMALL " * which will tell you that SMALL is defined as 1e-10 in f_wall.h at the line 207 (in Fluent 14.5). Why don't you just use mySMALL? C.C likes this.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[snappyHexMesh] .STL: non-closed manifold surface	giulio.topazio	OpenFOAM Meshing & Mesh Conversion	32	November 25, 2016 03:15
why did Time step is too small in stiffbs?	satum	FLUENT	1	December 10, 2012 09:15
Simulating small features on large models	siw	CFX	1	February 16, 2012 17:10
Small influence of convection in PISO if Courant number is small	sebi	OpenFOAM	0	February 22, 2011 14:55
small size holes simulation	brian ko	Phoenics	5	October 22, 2001 12:53

November 1, 2013, 05:07		#3
C.C Member CC Join Date: Jun 2011 Posts: 73 Rep Power: 14	Hello sbaffini, Thank you! Your answer helps me. Probably I'll use a different SMALL value from that of fluent. Best regards, CC