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<div style="direction: ltr;font-family: Tahoma;color: #000000;font-size: 12pt;">Hi Muhsin,<br>
<br>
For variable transport properties case (IFUSERVP=T), utrans and udiff are the transport and diffusion coefficients, respectively, in a particular advection-diffusion equation. Namely, when solving for momentum (ifield=1), they are density and dynamic viscosity,
while are thermal conductivity per volume and thermal conductivity while solving for temperature (ifield=2).<br>
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Note for the constant properties case, they are taken from .rea file as RHO, VISC, RHOCP and CONDUCT parameters.<br>
<br>
Aleks<br>
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<div style="direction: ltr;" id="divRpF817023"><font size="2" color="#000000" face="Tahoma"><b>From:</b> nek5000-users-bounces@lists.mcs.anl.gov [nek5000-users-bounces@lists.mcs.anl.gov] on behalf of nek5000-users@lists.mcs.anl.gov [nek5000-users@lists.mcs.anl.gov]<br>
<b>Sent:</b> Thursday, December 11, 2014 6:37 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> [Nek5000-users] USERVP<br>
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<div dir="ltr">Hi all,<br>
<br>
I am quite new in Nek5000 and I still trying to develop the understanding to use this program. May i know what are udiff and utrans stands for in uservp subroutine in .usr file? I aware that both will be using to control the variable properties. But which parameter
are those control in the equation? Thanks
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<div>Muhsin</div>
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