Re: [TRNSYS-users] Slab on grade

[David Bradley <bradley@tess-inc.com>]

Fabien,
  We usually recommend a node size progression that starts with
approximately 0.1 m at the edge of the slab and doubles in size with each
subsequent node. Then at some point, subsequent nodes stay the same size.
The progression might be 0.1m, 0.2m, 0.4m, 0.8m, 1.6m, 3.2m, 3.2m, 3.2m,
3.2m. In more recent versions of the slab model, we changed the required
parameter list so that it asks for the total number of nodes, the ratio
of one node size to the next, and the number of nodes after which the
size stays the same. 
Cheers,
 David
  

At 16:36 7/19/2006, fabien melenec wrote:

Dear TRNSYS users,

I am using the Type 703 modeling heat transfert from a slab to the soil with interfaces with Type 56. I want to use the Kasuda correlation to caculate the surface temperature but I don't know exactly which values to set for the lenght of soil node Dx(i), the width of soil node Dy(j) and the depth of soil node Dz(k) in order to define my 3D ground element beneath the slab surface and of course to have coherent results. Is someone already used this component and could help me?

Thanks for your answers

Fabien

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