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Calculating dx when there is aspect ratioHI
At the end of Suhaz V . Patankar Numerical heat transfer book there is T-teach computer program that for calculatig first dx has calculating below:sumx=0.5*expfac**(n-4)+(expfac**(n-3)-1.0)/(expfac-1.0)+0.5 dx=altot/sumx expfac=expansion factor n= number of cells in x direction altot=for example length of pipe if expansion factor is assuming 1.2 then each dx should greater than previous cell and it's equal to dx*expfac. in that case we have series: dx=(1+expfac+expfac**2+expfac**3+...+expfac**n)/altot i don't understand the origin of first the formula with red colour please help me? |

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