Dear OpenFOAM users I am lo
 

Dear OpenFOAM users

I am looking for help on specifying free-surface interface for a 3d geometry. The problem setup is following:

I have a shake-flask geometry. I am using interFoam to simulate the mixing of two fluids. Right now I am stuck with how to specify the height of the free surface. In CFX it could be done easily using the step function (ref. tutorial 7 of CFX). I am attaching the figure for clarity.

http://www.cfd-online.com/OpenFOAM_D...ges/1/4602.jpg

Please help me !!!!
Thanks in advance

With Kind regards
Jaswi

setField?
 

setField?

Thanks Liu. I have looked i
 

Thanks Liu.

I have looked into the dambreak problem and trying with the box option. What i am not sure is that whether one could use the box command to specify a 3d region. box requires min and max. right now my approach is trial and error :-). If you please know how box works then please help

Kind Regards
Jaswi

In setField you specify the co
 

In setField you specify the coordinates of the boxdiagonal. For example, if you specify the coordinates of a unitbox centered at origo you would do

(-0.5,-0.5,-0.5) (0.5,0.5,0.5)

If your box can enclose the region of interest than this should be straight forward.

Good luck

/Joakim

Thanks a lot Joakim. It works
 

Thanks a lot Joakim. It works !!!!. Just one last doubt :-)...
The domain is cylindrical and the box command is rectangular. I am specifying a box with the size a little larger than my cylinder. Does setField works on the set :

(cylinder) Intersection (box)
----
Also i have seen some people using funkySetField. Did u ever come across it !!!. With box command the interface is not very sharp and i am just wondering if funkySetField will give sharper interface. I am just a bit short of time to give it a try for now :-)


Thanks once again. U saved my life :-D

With Kind Regards
Jaswi

Hi Jaswi Yes it works fine.
 

Hi Jaswi

Yes it works fine.
I have never tried the funkySetField.

Hope things works for you.

Regards

/Joakim

Hi Jaswi! @funkySetFields:
 

Hi Jaswi!

@funkySetFields: I don't know what you mean with sharp. With

funkySetField . yourCase -field gamma -condition "pos().z<0" -expression "1."

you would get a partially filled geometry. The "problem" (and I think the same is true for setFields with the box option) is that the condition is only evaluated for the centers of the cells. So if the cell layer around z==0 is not "parallel" to the xy-plane you might get a "ragged" interface (no partially filled cells). So actually it produces a "sharper" interface than is desirable for that case

Thanks a lot Bernhard shall
 

Thanks a lot Bernhard

shall give it a try :-)

Regards
Jaswi

PS: Bernhard I am posting a further query. Please take a look at your convenience.

Hi, I download "funkSetfiel
 

Hi,

I download "funkSetfields" from the wiki page, when I try to compile it, I run into erros:

//***************
./ValueExpressionDriver.H:22: error: incomplete type 've::ValueExpressionParser' used in nested name specifier
./ValueExpressionDriver.H:22: error: 'yylval' was not declared in this scope
./ValueExpressionDriver.H:22: error: expected primary-expression before '*' token
./ValueExpressionDriver.H:22: error: 'yylloc' was not declared in this scope
./ValueExpressionDriver.H:22: error: expected primary-expression before '&' token
./ValueExpressionDriver.H:22: error: 'driver' was not declared in this scope
./ValueExpressionDriver.H:22: error: initializer expression list treated as compound expression
ValueExpressionParser.tab.cc: In member function 'virtual int yy::ValueExpressionParser::parse()':
ValueExpressionParser.tab.cc:409: error: 'velex' cannot be used as a function
In file included from ValueExpressionParser.yy:63,
from ./ValueExpressionDriver.H:11,
from ValueExpressionLexer.ll:3:
./ValueExpressionDriverLogicalTemplates.H:7: error: expected initializer before '<' token
./ValueExpressionDriverLogicalTemplates.H:13: error: expected initializer before '<' token
./ValueExpressionDriverLogicalTemplates.H:48: error: invalid use of incomplete type 'struct ValueExpressionDriver'
ValueExpressionParser.yy:27: error: forward declaration of 'struct ValueExpressionDriver'
./ValueExpressionDriverLogicalTemplates.H:74: error: invalid use of incomplete type 'struct ValueExpressionDriver'
ValueExpressionParser.yy:27: error: forward declaration of 'struct ValueExpressionDriver'
./ValueExpressionDriverLogicalTemplates.H:105: error: invalid use of incomplete type 'struct ValueExpressionDriver'
ValueExpressionParser.yy:27: error: forward declaration of 'struct ValueExpressionDriver'
./ValueExpressionDriverLogicalTemplates.H:133: error: invalid use of incomplete type 'struct ValueExpressionDriver'
ValueExpressionParser.yy:27: error: forward declaration of 'struct ValueExpressionDriver'
In file included from ValueExpressionLexer.ll:3:
./ValueExpressionDriver.H:22: error: incomplete type 've::ValueExpressionParser' used in nested name specifier
./ValueExpressionDriver.H:22: error: 'yylval' was not declared in this scope
./ValueExpressionDriver.H:22: error: expected primary-expression before '*' token
./ValueExpressionDriver.H:22: error: 'yylloc' was not declared in this scope
./ValueExpressionDriver.H:22: error: expected primary-expression before '&' token
./ValueExpressionDriver.H:22: error: 'driver' was not declared in this scope
./ValueExpressionDriver.H:22: error: initializer expression list treated as compound expression
lex.ve.c:6945: error: redefinition of 'int velex'
./ValueExpressionDriver.H:22: error: 'int velex' previously defined here
lex.ve.c:6945: error: incomplete type 've::ValueExpressionParser' used in nested name specifier
lex.ve.c:6945: error: 'yylval' was not declared in this scope
lex.ve.c:6945: error: expected primary-expression before '*' token
lex.ve.c:6945: error: 'yylloc' was not declared in this scope
lex.ve.c:6945: error: expected primary-expression before '&' token
lex.ve.c:6945: error: 'driver' was not declared in this scope
ValueExpressionParser.tab.cc: In member function 'unsigned char yy::ValueExpressionParser::yytranslate_(int)':
ValueExpressionParser.tab.cc:2141: warning: use of old-style cast
ValueExpressionParser.yy: At global scope:
ValueExpressionParser.yy:327: error: expected unqualified-id before '&' token
ValueExpressionParser.yy:327: error: expected ',' or '...' before '&' token
ValueExpressionParser.yy:327: error: invalid use of incomplete type 'struct ve::ValueExpressionParser'
//************************

Could anyone give me some ideas?

BTW:I read the "README" file, it says it works for OF 1.4, but I am now using 1.4.1-dev

Kind regards

feng

Hi, I get some idea from th
 

Hi,

I get some idea from the following link, and the problem is solved.....

http://www.cfd-online.com/OpenFOAM_D...ges/1/368.html

kind regards

feng