Chapter 5, Problem 5.21P

Interpretation Introduction

Interpretation: The fluid velocity for the given fluids at a particular temperature across a square channel is to be calculated.

Concept introduction: The Reynold’s number determine the types of fluid which are flowing across a given channel and it is given as,

  $\text{Re}\text{=}\frac{{\text{ρ×v×D}}_{\text{eq}}}{\text{μ}}$ ……. (1)

The notations used in this formula are,

  $\begin{array}{l}\text{Re}\text{=}\text{Reynold's}\text{Number}\\ \text{ρ}\text{=}\text{Density}\text{of}\text{fluid}\\ \text{v}\text{=}\text{Average}\text{Velocity}\text{of}\text{fluid}\text{with}\text{which}\text{it}\text{is}\text{flowing}\\ {\text{D}}_{\text{eq}}\text{=Equivalent}\text{Diameter}\text{of}\text{the}\text{tube/pipe}\text{in}\text{which}\text{flow}\text{is}\text{occuring}\end{array}$

  ${\text{D}}_{\text{eq}}$ is the equivalent diameter which is used in the case of non-circular channels.