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Type 19

Dear colleagues,
I kindly request you to help me. My problem is that I can not calculate the transfer function coefficients of a roof constituted by three layers: A0 - galvanized iron - E0 (resistance=0.1044 SI). Having executed the prep program I receive always this message: "unable to find a root after indication that a root existed"
the proprieties of the galvanised iron are as folowed:
layer thickness = 0.002 (m)
conductivity = 396 (kJ/hr-m-°C)
density = 7200 (kg/m**3)
specific heat = 0.38 (kJ/kg-°C)
I thank you in advance.
Best regards,

M. Ahachad
LEPTAB
Université de La Rochelle
France.

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