# Thermal Diffusivity of Enthalpy

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

 August 29, 2006, 10:57 Hello, Does anyone know how #1 Member   E. David Huckaby Join Date: Mar 2009 Posts: 57 Rep Power: 10 Hello, Does anyone know how the thermal diffusivity for enthalpy is derived ? Both "src/thermophysicalProperties/specie/transport/sutherland/sutherlandTransportI.H " and "src/thermophysicalProperties/specie/transport/const/constTransportI.H" in the function alpha() calculate this as: alpha = kappa / CpBar with CpBar = ( (T - Tstd)*(H(T) - H(Tstd)) + Cp(T) )/(sqr(T-Tstd) + 1 ) I would have thought it would be alpha = kappa/Cp(T). thanks Dave

 November 6, 2010, 08:20 Re: thermal diffusivity for enthalpy - what is it and what is Cp bar ???? #2 New Member   Richard Samuel Join Date: Mar 2009 Location: Canberra, ACT, Australia Posts: 9 Rep Power: 10 I was wondering about this also. For T = Tstd, Cp bar is undefined, therefore I can't understand what sort of property Cp bar is. Some texts call Cp bar the mean value of Cp but that really doesn't make sense here either. Anyone ??? Richard

 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 Kenji CD-adapco 2 March 19, 2008 19:40 Ale CD-adapco 4 April 17, 2007 03:43 galary FLUENT 1 May 24, 2006 10:10 mspark CD-adapco 1 April 1, 2004 06:20 intern CFX 0 May 6, 2002 11:07

All times are GMT -4. The time now is 21:34.