- #1

- 20

- 0

## Main Question or Discussion Point

hi Everyone,

I have a couple of books on heat transfer (Heat Transfer, A Practical Approach by Cengel and another one) but none of them contain any information on Nu number for vertical rectangular enclosures. I am trying to find convection coefficient (for free convection) and need Nu to determine h. I know that Nu depends on H (height), L (width or space between walls), Pr (Prandtl number) and RaL (Rayleigh number). What I am intertested in is situations for 8 < H/L < 70, Pr < 1 (for air) and

RaL > 1000. Do you know any books that contain experimental data for Nu under such conditions. If you know of any table with experimental data anywhere would be appreciated. I have a general idea that Nu must be less then 10 and greater then 2 but no idea which value. CFD and FEA software is normally used to calculate Nu for certain simulations as well.

Thanks in advance

I have a couple of books on heat transfer (Heat Transfer, A Practical Approach by Cengel and another one) but none of them contain any information on Nu number for vertical rectangular enclosures. I am trying to find convection coefficient (for free convection) and need Nu to determine h. I know that Nu depends on H (height), L (width or space between walls), Pr (Prandtl number) and RaL (Rayleigh number). What I am intertested in is situations for 8 < H/L < 70, Pr < 1 (for air) and

RaL > 1000. Do you know any books that contain experimental data for Nu under such conditions. If you know of any table with experimental data anywhere would be appreciated. I have a general idea that Nu must be less then 10 and greater then 2 but no idea which value. CFD and FEA software is normally used to calculate Nu for certain simulations as well.

Thanks in advance