ABSTRACT
This chapter considers transient-conduction problems in which there is no internal heat generation. The Biot number is a dimensionless ratio of convection to conduction resistance to heat transfer. Thus, the Biot number gives an indication of the temperature drop within the solid compared to the temperature difference between the solid surface and the fluid. Several approximate methods of solution to transient-heat-conduction problems exist. The chapter presents two of them—the numerical and graphical method. Numerical methods was stated that the technique involves rewriting the differential equation in terms of a set of simultaneous algebraic equations. At least two graphical methods have been developed to solve one-dimensional unsteady conduction problems—the Schmidt- and the Saul’ev plot. The Schmidt plot is a graphical equivalent of the one-dimensional explicit numerical method of solution. Because of the confusing nature of the completed graph, it is advantageous to spend more time on the Saul’ev method; it is easier to draw and interpret.
