... (H2) or a mixture of both. This paper presents analytic small aspect ratio asymptotic solutions and tables of Poiseuille and Nusselt numbers for various aspect ratios and boundary conditions. We find our Ritz method is accurate and efficient. In comparison to fully numerical methods (e.g., finite...

... singular perturbation asymptotic solutions The classical problem of the heat and mass transfer from single spheres due to pure conduction is as old as the subject of heat transfer itself. It has its origins in a series of short papers that formed the doctoral thesis of Fourier, which were...