Determine the convection coefficient for gas flow

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A simple procedure for measuring surface convection heat transfer coefficients involves coating the surface with a thin layer of material having a precise melting point temperature. The surface is then heated and, by determining the time required for melting to occur.

289_procedure for measuring surface convection.jpg

The convection coefficient is determined. The following experimental arrangement uses the procedure to determine the convection coefficient for gas flow normal to a surface. Specifically, a long copper rod is encased in a super insulator of very low thermal conductivity, and a very thin coating is applied to its exposed surface. If the rod is initially at 25°C and gas flow for which h = 200 W/m2 · K and T8 = 300°C is initiated, what is the melting point temperature of the coating if melting is observed to occur at t = 400 s?

Reference no: EM13879954

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