A piece of beef steak 7 cm thick will be frozen in the freezer room -40 ° C. the product has a moisture content of 73%, a density of 970 kg / m cubic, and a thermal conductivity (frozen) of 1.1 W / (mK). Estimate the freezing time using the Plank equation. This product has an initial freezing temperature of -1.75 ° C, and the movement of air in the freezing room gives a convective transfer coefficient of 10 W / (m squared K)

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Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.