2. The mass transfer coefficient (k, in m/s), for flow of a fluid over a solute surface, is expected to be a function of the characteristic length (Le), fluid velocity (v), kinematic viscosity (v) and diffusivity (D). In order to predict the mass transfer coefficient for flow over a body, a one-twelfth geometrically similar model was used. a) Express the relation for this mass transfer process in dimensionless form. b) Assuming that the properties are same for prototype and model experiment, what fluid velocity should be used to maintain similarity? c) How many times more would be the prototype mass transfer coefficient compared to that of the model