#include udf.h define_turbulent_viscosity (user_mu_t,c,t) { real mu_t; The statement is correct. The form given by the questioner is actually a result derived from the eddy viscosity hypothesis (boussinesq hypothesis) + prantl’s mixing length hypothesis (prantl’s mixing length hypothesis), and is not the original definition of turbulence viscosity. . First of all, kinematic viscosity is a property of a fluid. We can understand that the higher the dynamic viscosity, the greater the viscosity of the fluid, and the greater the degree of fluid deformation under the action of shear stress. For liquids, dynamic viscosity.
Tracing the Path of Fluids A Deep Dive into Viscous Flow with
Equation (1) is often also called Newton's viscosity law (for Newtonian fluids), where \mu is also called dynamic viscosity. We can think of the viscosity coefficient as the internal friction when the fluid is moving, which plays a role in changing the velocity of different flow layers. Dynamic is "dynamics" and usually involves "force" and "motion", while kinematic is "kinematics" and only involves "motion" itself. "Dynamic viscosity" is dynamic viscosity, also known as absolute viscosity and shear viscosity. "kinematic viscosity" means kinematic viscosity.
