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Numerical simulation of magnetohydrodynamic turbulent duct flow is important in the application of liquid metal fusion blanket. We develop a large eddy simulation magnetohydrodynamic turbulent flow solver based on finite volume method and dynamic Smagorinsky subgrid model in OpenFOAM environment. The induced magnetic field is negligible as the magnetic Reynolds number is small. The electric potential Poisson equation has been used to solve the electromagnetic field. The consistent and conservative method has been used to solve the electric potential, the electric current and the Lorentz force. Periodic boundary condition has been used at the inlet and outlet. We investigate the effects of applied magnetic field on mean velocity field, fluctuation velocity, and turbulent kinetic energy of the liquid metal fluid flow. The secondary flow generated by the anisotropic turbulence stress has been shown obviously. As the Hartmann number increases the turbulent kinetic energy decreases, which shows the turbulence suppression effects of the external magnetic field.

LARGE EDDY SIMULATIONS OF MAGNETIC FIELD EFFECT ON TURBULENT FLOW IN A SQUARE DUCT