Learning Forum

[FERO86]

Recently i carried out the simulation of Rayleigh-Benard convection inside a Rectangle (Aspect ratio 2:1). For comparing the results with one of the paper. The simulated results plot of Nusselt number vs X (distance) for Ra (rayleigh number 10^4) with boundary conditions: top plate = 325 k, Bottom plate= 295 k, Side walls= adiabatic, fluid: water, Pr= 6.57. are as follow

[Rob]

Read the Nusselt Number definition in the User's Guide, then look at the values it's using. n

[YasserSelima]

What is the reference length you are using? Compare it to the characteristic length used in the papern

[FERO86]

What is the reference length you are using? Compare it to the characteristic length used in the paperhttps://forum.ansys.com/discussion/comment/111466#Comment_111466

Characteristic length which i have used is the height (H) of the rectangle same which is used in paper.n

[DrAmine]

Also check the reference temperature on which the htc is based and compare to the formulation used in the pape.I remember in the past in similar exercise I just exported the heat flux at the wall along the a line or whatever and made post processing to get Nu outside of the code.n

[DrAmine]

Good luck.n

[FERO86]

Good luck.https://forum.ansys.com/discussion/comment/111505#Comment_111505

thanks a lot, sirn

[DrAmine]

Welcome!n