The dispersion of a chemically reacting solute in a micropolar fluid

Abstract The paper presents solution for the dispersion of a solute in a micropolar fluid flow in a circular pipe in the presence of an irreversible first order chemical reaction. It is shown that the solute is dispersed relative to a plane moving with the mean speed of the flow with an effective Taylor dispersion coefficient, dependent on two parameters, κ μ and λ characteristic of the micropolar fluid and also on the reaction rate parameter a for a homogeneous reaction in the bulk of the fluid in which the solute is dispersed. It is found that for a given α the effective Taylor dispersion coefficient decreases with an increase in κ μ for fixed λ while it increases with increase in λ for fixed κ μ . It decreases with increase in a for assumed values of κ μ and λ.