CEL Variable "sstrnr"

April 3, 2006, 02:26

Hi friends,

I am trying to calculate effective shear strain-rate (€bar) for a non-newtonian flow from shear strain-rate (&euro

variable of CFX; "sstrnr". The relaton is ;

€bar = sqrt(2/3 €ij €ij) , ij are indexes

However i dont know what "sstrnr" gives? A vector or a matrix? Can anyone help me

Thanks,

Serdar

April 3, 2006, 06:49

Serdar,

The variable sstrnr is simply a scalar (modulus) representation of the shear strain rate tensor. If you want to calculate a quantity based on the tensor components, you'll need to extract velocity gradients via User Fortran in CFX.

A description of the tensor and the sstrnr scalar is in the documentation.

Regards,

Johnson

April 3, 2006, 02:26	CEL Variable "sstrnr"	#1
Mgtripple Guest Posts: n/a	Hi friends, I am trying to calculate effective shear strain-rate (€bar) for a non-newtonian flow from shear strain-rate (&euro variable of CFX; "sstrnr". The relaton is ; €bar = sqrt(2/3 €ij €ij) , ij are indexes However i dont know what "sstrnr" gives? A vector or a matrix? Can anyone help me Thanks, Serdar

April 3, 2006, 06:49	Re: CEL Variable "sstrnr"	#2
Johnson Guest Posts: n/a	Serdar, The variable sstrnr is simply a scalar (modulus) representation of the shear strain rate tensor. If you want to calculate a quantity based on the tensor components, you'll need to extract velocity gradients via User Fortran in CFX. A description of the tensor and the sstrnr scalar is in the documentation. Regards, Johnson

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