Question

Explain prandtl no., reynolds no. and grashof no.

Answer 1

Grashof number. The Grashof number(Gr) is a dimensionless number in fluid dynamics and heat transfer which approximates the ratio of the buoyancy to viscous force acting on a fluid. It frequently arises in the study of situations involving natural convection and is analogous to the Reynolds number.

Reynolds number a dimensionless number used in fluid mechanics to indicate whether fluid flow past a body or in a duct is steady or turbulent.

Prandtl number a dimensionless parameter used in calculations of heat transfer between a moving fluid and a solid body, equal to c p v / k, where c p is the heat capacity per unit volume of the fluid, v its kinematic viscosity, and k its thermal conductivity.