<div dir="ltr"><div>Hi again Neks,<br><br>Sorry to ask again on these problem as there is no answer yet. I've been trying to understand how the flux boundary condition works in here because I've tried to work on both nondimensional and dimensionalized problem. However, if I put constant value for the heat flux at the boundary in userbc, I keep getting a constant temperature value after a developed length in the downstream which should not be the case as the flow temperature should keep increasing by the energy in especially for the dimensionalized problem. Would anyone mind to share with me your knowledge on this? Thanks</div><div><br>Muhsin</div><div><br></div><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Muhsin Mohd Amin</b> <span dir="ltr"><<a href="mailto:mmohdamin1@sheffield.ac.uk">mmohdamin1@sheffield.ac.uk</a>></span><br>Date: 1 April 2015 at 18:21<br>Subject: heat flux BC<br>To: <a href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a><br><br><br><div dir="ltr">Hi Neks,<br><br>I still trying to understand the calculation works in Nek5000<br>Sorry for some basic questions as not much of example on the flux BC:<br><br>1. If I put the boundary condition as flux, do I need to calculate the resultant heat transfer coefficient or can I just obtain thoroughly from the code? because I haven't found the HTC output any inside the code, but whenever I grab the 'HC' it gives me some value. So what would be the value of HC that I obtain there if I cannot get it directly from the code?<br><br><div>2. If I specify the flux number in the userbc for nondimensionalized equation, how the deltaT is normalized is it to the bulk temperature?<br><br></div><div>3. All values that specified in the usr file for dimensionalized has to be SI unit isn't it? as the flux should be in W/m2?<div><br></div><div><div><br></div><div>Regards,</div><span class=""><font color="#888888">-- <br><div><div dir="ltr">Muhsin Mohd Amin<div>Graduate Student<br>Department of Mechanical Engineering</div><div>The University of Sheffield</div></div></div>
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</div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">Muhsin Mohd Amin<div>Graduate Student<br>Department of Mechanical Engineering</div><div>The University of Sheffield</div></div></div>
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