This page calculates the average heat transfer coefficient and heat convected from an isothermal (constant temperature) flat plate at a specified temperature in free stream flow. The convection calculation automatically switches between laminar and turbulent convection correlations based on Reynolds number.

Define the plate size, surface temperature, ambient air fluid temperature and approach flow speed. You also need to define the fluid properties. This page will calculate a heat transfer coefficient based on the flow conditions as well as the heat transfer by convection from the isothermal plate.

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Plate and Flow Conditions

Fluid Properties at Film Temperature (Default is for Air at 20C)

Description Symbol Value Units
Film Temperature = (Tp+Ta)/2 Tf oC
Specific Heat  Cp J/kg-oC
Thermal Conductivity k W/m-oC
Dynamic Viscosity � kg/m-s
Density rho kg/m3

Plate Dimensions

Description Symbol Value Units
Plate Width (across flow) W Meters
Plate Length (along flow) L Meters
Plate Temperature Tp oC
Ambient Temperature Ta oC
Flow Velocity um m/s

Results for Isothermal Plate

Description Symbol Value Units
Prandtl Number = v/a Pr None
Reynolds Number = um*L/v Re None
Nusselt Number = Nu None
Heat Transfer Coefficient = Nu*k/L h W/m2-C
Heat Dissipated from Plate = h*W*L*(Tp-Ta) q W

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