A coupled heat transfer model of phase change, radiation and heat conduction at steady state under solar irradiation in a semitransparent PCM-glazed unit was developed. Interior energy transfer of PCM-glazed unit was simulated with controlling volume method and Bouguer-Beer Law. Effects of radiation physical parameters, internal and external environment on heat transfer coefficient were investigated.It shows that it is necessary to consider semitransparent property of PCM-glazed unit as calculating heat transfer coefficient.Except for radiation physical property and environment, liquid fraction and light transmittance of PCM affect heat transfer coefficient as well.

A variable-scale lattice gas automata model for gas-solid two-phase flow is established based on lattice gas automata (LGA)in which macroscopic behavior is described with microscopic gas-solid interactions.A two-dimensional flow field is divided into two.deck hexagon laRiees with different scales,where solid particles and gas pseudo-particles are aligned in lattices for solid and gas respectively.In addition to basic LGA rules.collision and propagation rules ale specifically designed for gas-solid systems,as well as additional evolution rules.A statistical method of macroscopic properties and conversion between model parameters and hydrodynamic properties based on similarity principle aIe established. Simulations of dynamic behaviors of gas-solid two-phase flow in a bubbling fluidized bed with this model show good agreement with experiments as well as simulation results with a two-fluid model.It has less average deviation,which validates the proposed model.

Nine kinds of heavy oil thermal recovery models are summarized,including non-Newtonian power-law fiuids model,two-region composite reservoir model,three-region composite reservoir model,multi-region composite reservoir model,model with consideration of gravity override and interference testing well model,etc.Pressures and pressure derivatives are briefly analyzed.Advantages and disadvantages of models are compared.Problems in current models and trends in research of heavy oil well test are pointed out.

Linear parabolized stability equations(LPSE) considering model curvature are solved with finite difference method.Stationary cross-flow instabilities in boundary layers of an infinite swept-wing are analyzed.LPSE and experimental results are compared.It is shown that at early development of stationary cross-flow disturbances,LPSE simulates flow structure and disturbance profiles well and predicts the N-factors accurately.When disturbances are amplified enough,high order terms can not be omitted and linearization assumption of LPSE is no longer suitable.Moreover,effects of model curvature and boundary layer non-parallelism are investigated.It shows that curvature and non-parallel terms have significant effects on stability analysis of stationary cross-flow instabilities on a swept-wing,and the effects are independent of Reynolds numbers.In the model investigated,inclusion of curvature has a stabilizing effect and non-parallelism shows destabilizing effects on disturbances.

A hybrid optimization algorithm is developed for solving ellipsometric measurement problem.This algorithm is based on the high ability of simulated annealing method in seeking optimum solution and the high computation efficiency of simple shape method.It seeks the global minimum solution of objective function and gets proper parameters of optical model.The computation efficiency is higher than that of simulated annealing algorithm.The selection of inversion controlling parameters is discussed to make this algorithm adaptive.

To carry out the data assimilation of sea temperature observations the adjoint method is applied, which can provide an accurate initial temperature field for numerical prediction. For simplicity we consider only a one-dimensional sea temperature model, what are discussed in this paper involve, the idea of the adjoint method, the optimal procedure and the finite difference schemes of sea temperature control equation and adjoint equation. Numerical results are also presented for describing the varying sea temperature field.