Liquid Metal MHD generation system for wave energy takes the wave motion into reciprocating motion of the liquid metal by using the efficient liquid Metal MHD power generation technology, and then the wave energy directly changes into electrical energy through the power conversion system. According to this principle, a flexible and direct magnetic fluid generating structure for wave energy is proposed. It selects the appropriate permanent magnet material and the liquid fluid, also an articulated manner to the permanent magnet. An array mode of permanent magnet and the initial channel structure of generating is important. The device has an advantage of low pollution, high efficiency and technology, can reduce energy consumption, improve energy conversion efficiency.

Based on the finite volume method, the Navier-Stokes equations was used as the governing equations to develop a new module of the wave generating and absorbing function. The wave generating was introduced as the man-made source terms into the momentum equations, which was suitable for the volume of fluid method (VOF). Within the numerical wave flume, the reflected waves from the construction could be absorbed effectively. The absorbing section arranged at the end of the wave flume was for absorbing the incident wave, which allows for random and effective working time within the reletively smaller computation domain. Consequently, the computation efficiency was greatly improved. Finally, the validity of the absorbing section arranged at the front and end of the wave flume was investigated individually.

The CFD software FLUENT was used as the foundation to develop the numerical wave flume, in which the governing equations are the Reynolds-averaged Navier-Stokes (RANS) equations and the standard k~ε turbulence model. The wave generating and absorbing were introduced into the RANS equations as the source terms using the relaxation approach. A new module of the wave generating and absorbing function, which is suitable for FLUENT based on the volume of fluid method (VOF), was established. Within the numerical wave flume, the reflected waves from the model within the computation domain can be absorbed effectively before second reflection appears due to the wave generating boundary. The computational results of the wave pressures on the bottom of the rectangular slab were validated for the different relative clearance by the experimental data. Good agreements were found.

This paper describes a new kind of direct-drive wave turbine, which collects wave energy and part of tide through a specially designed turbine device. We want to know the right flow rate,the maximum torque, the average power.Focusing on the use of ANSYS software for the model under different flow rates, we obtain important parameters such as torque and power. Then further analysis and research by experiment are proposed. We could draw a conclusion that the device is a low number of revolutions of the turbine, which unit capacity of up to 300W, suitable for the actual ocean wave gathering requirements .The article can provide practical guidance to optimize the design.