... that the sector method is effective also in determining the geometry of the critical insulation in this case over a wide range of radius ratio and Biot number. Finally, both all the three methods, i.e., the perturbation technique, the boundary collocation method and the sector method have been applied...

... an improved analysis of conduction in shaped tubes. A semianalytical technique based on boundary collocation method (BCM) has been proposed to solve the two-dimensional conduction problem in these typical geometry. Next a simple approximate technique has been...