In this paper, incompressible, thermohaline double diffusive convection system is simulated using finite difference schemes with the boundary fitted coordinate system.

Stability of multiple equilibria in the thermohaline double-diffusive system is studied here with numerical method in a body-fitted curvilinear coordinate system by introducing nonlinear equation of state, temperature-flux boundary condition and variable limit of forced boundary condition into this system.

The systematic study on Al alloy and stainless steel joined by diffusion welding with two-step temperature is conducted by using plating Cu layer, plating Ag layer and Al-Si alloy foil as reactive materials in the case of different joining temperature and holding time.

The similarity criteria can be matched in the model experiment and the salt water dispersion can be employed to simu.