Microcalorimetry was developed to determine thermal conductivities(λ)of thermal insulators with hollow cylindrical shapes,A special device of speciment with re
A full solution of two-dimensional Navier-Stokes and energy equation was conducted numerically to analyze the natural convection of the horizontal strip with an
Some conceptual problems were discussed in the present paper,Firstly,according to the physical meaning of effectiveness,a new expression of effectiveness was de
In this paper,the two approximate hypotheses in boundary layer theory δp/δy=0,δ^2u/δx^2=0,are reinvestigated and analyzed,while a new approximate hypothesis