Graetz number is given by

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Graetz number is given by

A. $$\frac{{{\text{m}}{{\text{C}}_{\text{p}}}}}{{{\text{kL}}}}$$

B. $$\frac{{{\text{kL}}}}{{{\text{m}}{{\text{C}}_{\text{p}}}}}$$

C. $$\frac{{{\text{m}}{{\text{C}}_{\text{p}}}}}{{{\text{k}}\mu }}$$

D. $$\frac{{{\text{k}}\mu }}{{{\text{m}}{{\text{C}}_{\text{p}}}}}$$

Answer: Option A

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