Phase change heat transfer of a gold particle irradiated by ulter-fast laser was studied. Position of solid-liquid interface was determined with coupling interface energy balance equation and interface tracking method for nucleation dynamics. In addition, effects of laser parameters on sintering process were studied. It showed that as laser irradiates gold particle vertically, melting phenomenon occurs mainly in poles of particle. Bottom of particle melts earlier than top and melting volume is smaller. As laser pulse width becomes shorter melting is earlier and melting volume increases. Melting degree of particle increases with laser heat source fluence.

Genetic Algorithm(GA) is provided to solve the Eu₂O₃(Cubic) Mössbauer Spectra. And the results are compared with parameters coming from references and MossWin(another software for solving Mössbauer Spectrum.

A 13-speed lattice Boltzmann model is used to investigate Couette flow with a temperature gradient and viscous cavity flow. The Couette flow for Pr=0.91, Re=100,5000 and Pr=0.91,1,1.25 and Re=3000, are simulated with the evolution of driven flow, temperature and viscous heat dissipation. And the distributions of vortex and temperature are shown at Re=3000 the steady flow field for viscous cavity flow.

The Lattice Boltzmann Method of the 2D convection-diffusion equation is described using the nine-speed model on the square lattice.The coefficients in the equilibrium distribution are determined by the convection coefficient and the diffusion coefficient.The simulating results fit well with the theoretical results.