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Description:
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A study of the induced hydrodynamic flow transient and the imposed thermal transient associated with step increases in wall temperature for laminar gas flow in a clrcular tube is presented . The basic governing equations are derived with property variations taken into account . The governing equations are put into an appropriate form for numerical solution . Problem data are specified using air as the gas , and solutions are obtained for three different step increases in the tube wall temperature . It is determined that the step increase in wall temperature produdes not only a thermal transient but also an induced hydrodynamic transient resulting in a corresponding friction factor transient . |