# Multicomponent with Temperature dependent

 Register Blogs Members List Search Today's Posts Mark Forums Read

 September 14, 2008, 21:59 Multicomponent with Temperature dependent #1 SAKTI Guest   Posts: n/a Sponsored Links Dear All, I want to simulate the real exhaust gas component, the case is temperature dependent. Which thermophysical properties should I use? The multicomponent option doest concern the temperature dependent right? how about the polynomial option? will it concern the multicomponent effect? Best regards Sakti

 September 14, 2008, 23:48 Re: Multicomponent with Temperature dependent #2 usker Guest   Posts: n/a Multicomponent means concentration dependent, this option is suitable for multi-component mixtures. Depending on the density setting, STAR uses a constant specific heat Cv or Cp (or any other thermophysical property) for the background fluid. It also uses constant specific heats for any additional scalars present to calculate a mixture specific heat weighted according to the local concentration of each component. Polynomial calculates the specific heat Cp (or any other thermophysical property) as a polynomial function of temperature (non-linear change of specific heat with temperature). If you click Define/Edit polynomial, it opens a special Polynomial Function Definition dialog in which polynomial coefficients may be created or edited, as necessary. Regards

 September 15, 2008, 01:20 Re: Multicomponent with Temperature dependent #3 SAKTI Guest   Posts: n/a Dear Mr. Usker Thank you for your reply, what if the properties value both concentration and temperature dependent? regards Byan

 September 15, 2008, 22:09 Re: Multicomponent with Temperature dependent #4 usker Guest   Posts: n/a Then your Density will be a function of pressure and temperature. Molecular Viscosity - MultiComponent, (if your Viscosity is temperature dependent, then you have to use Sutherland. Please, refer to Star-CD Methodology. Specific Heat - Polynomial Conductivity - Constant or Polynomial (usually Constant, but it depends on the flow conditions)

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post RP FloEFD, FloWorks & FloTHERM 3 March 22, 2012 02:46 Christoph Ley Phoenics 2 June 5, 2008 09:05 RP Main CFD Forum 1 March 28, 2008 02:22 kdarc OpenFOAM Running, Solving & CFD 3 March 27, 2007 16:21 kishore rathore FLUENT 1 February 17, 2004 05:33