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Electronic computers have opened up vast fields in the world of science and Engineering. In many Engineering designs where only guessed solutions could be tested till now, it has become possible to optimize the designs by testing the various permutations and combinations of loads, strengths and configurations. Problems which could not possibly be touched so far due to prohibitive computational time involved are now amenable to solution. The widespread use of digital computers has revolutionized numerical analysis. The classical method of polynomial interpolation is replaced by computer...

Viscosity and thermal conductivity are two temperature dependent properties of matter. In most of the problems of fluid mechanics, the viscosity and thermal conductivity of the fluid were assumed to constant. However it is known that these physical properties can change significantly with temperature.When the effect of variable viscosity and thermal conductivity are taken in to account, the flow characteristics are substantially changed from that of constant cases. Most fluids however have temperature dependent properties, and under circumstances where large temperature gradients exist...