nu in cavity example

MaaadBob · September 21, 2011, 19:55

Hi everyone,

Just to warn you, I'm a complete CFD noob.

Looking over transportProperties file in the cavity example, what do the seven values within the square brackets represent in "nu [ 0 2 -1 0 0 0 0 ] 0.01;" ?

I see there are also seven-value 'dimensions' entries in the 0/U and 0/P files. Are these related to the nu entry above ?

Thanks,
Bob.

anon_a · September 22, 2011, 08:14

Hey Bob

The answer is in section 2.1.1.3 "Physical properties" of the user guide.
http://www.openfoam.com/docs/user/cavity.php
These are the physical units (m^2 / sec)

MaaadBob · September 22, 2011, 08:46

No, section 2.1.1.3 only details the kinematic viscosity value.

My question was, with the line "nu [ a b c d e f g ] 0.01", what does a -> g mean ?

I do appreciate your help though, so please bear with me.

Bob.

MaaadBob · September 22, 2011, 09:05

Found it ! Under section 4.2.6

Classic case of RTFM !

September 21, 2011, 19:55	nu in cavity example	#1
MaaadBob New Member Bob Beattie Join Date: Sep 2011 Location: Hampshire, UK Posts: 3 Rep Power: 15	Hi everyone, Just to warn you, I'm a complete CFD noob. Looking over transportProperties file in the cavity example, what do the seven values within the square brackets represent in "nu [ 0 2 -1 0 0 0 0 ] 0.01;" ? I see there are also seven-value 'dimensions' entries in the 0/U and 0/P files. Are these related to the nu entry above ? Thanks, Bob.

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September 22, 2011, 08:14		#2
anon_a Disabled Join Date: Mar 2011 Posts: 174 Rep Power: 15	Hey Bob The answer is in section 2.1.1.3 "Physical properties" of the user guide. http://www.openfoam.com/docs/user/cavity.php These are the physical units (m^2 / sec)

September 22, 2011, 08:46		#3
MaaadBob New Member Bob Beattie Join Date: Sep 2011 Location: Hampshire, UK Posts: 3 Rep Power: 15	No, section 2.1.1.3 only details the kinematic viscosity value. My question was, with the line "nu [ a b c d e f g ] 0.01", what does a -> g mean ? I do appreciate your help though, so please bear with me. Bob.

September 22, 2011, 09:05		#4
MaaadBob New Member Bob Beattie Join Date: Sep 2011 Location: Hampshire, UK Posts: 3 Rep Power: 15	Found it ! Under section 4.2.6 Classic case of RTFM !