Fluent is a CFD general software for simulating and calculating the flow and heat transfer problem,and was extensively applied to engineering field and science study.

In this paper, a new electrochemical disc was devised, to some extent, which improved the transfer speed, reduce thickness of diffusion layer, increase the mass transfer and DO in the electrolyte, and then advanced the efficiency of the electrode reaction and solve the mass transfer problem under low concentrations.

Conjugate heat transfer problem with surface radiation taken into account

Mass transfer problem for particles, drops and bubbles in a shear flow

A numerical solution of the axisymmetric steady heat and mass transfer problem for spherical particles, drops and bubbles in a linear Stokes shear flow is obtained for the entire range of Péclet numbers.

The radiative heat transfer problem for bodies traveling through the earth's atmosphere, as formulated in [1, 3], is considered in the case of low altitudes, i.e., for high gas densities and optical thicknesses in the shock layer.

Exact Solution of the Heat Transfer Problem for a Rotating Disk under Uniform Jet Impingement

On the basis of the analysis of the previous paper, the present work poses a series of problems in dilute-phase heat transfer technique as applied to chemical metallurgy, and illustrates its practical aspects through pilot-scale measurements and experiments in the development of new metallurgical processes.In actual practice, particles are more often than not in accelerative motion while heat is being transported between them and the surrounding fluid medium, with the result that the transfer...

On the basis of the analysis of the previous paper, the present work poses a series of problems in dilute-phase heat transfer technique as applied to chemical metallurgy, and illustrates its practical aspects through pilot-scale measurements and experiments in the development of new metallurgical processes.In actual practice, particles are more often than not in accelerative motion while heat is being transported between them and the surrounding fluid medium, with the result that the transfer coefficient seldom retains a constant value. An acceleration integral∫F(x)=integral from n=Re_0 to (Re_0+Re)((Re_s~xdRe_s)/(Ar_(Δρ)-fRe_s~2)) is proposed from which four dimensionless groups are derived (Eqs. (28), (29), (31), and (36)) which permit comparison of analogous heat transfer equipment on a generalized basis. Towards this end, Eq. (43) is derived for calculating the effectiveness of heat recovery for multi-layer dense-phase fluidization with full allowance for heterogeneous nonuniformity, so that the dense-phase operation may be compared directly with the corresponding dilute-phase operation as given by Eqs. (26) and (26a).After heat transfer measurements had been conducted on pilot scale, the authors applied the dilute-phase technique to heat transfer problems in the magnetizing roasting of low-grade iron ores and the sulfatizing roasting of an iron ore containing small amounts of copper and cobalt. In both cases pilot plant results indicate that the capital investment of dilute-phase equipment would be much lower that those of the conventional counterparts of corresponding capacities. Finally, it is concluded that dilute-phase technique is a new, yet rapidly developing field in the application of fluidization to chemical metallurgy, and a few important problems are proposed for future investigation.

在前文的分析基础上,提出了将稀相技术应用于流态化冶金中換热过程时的一系列問題,并通过稀相換热的扩大实驗和中間工厂实践进一步闡明稀相流态化的应用。在工艺換热过程中顆粒在加速度状态下与周围的流体进行換热,因此換热系数并非为常数。本文通过一个加速度积分∫F(x)=integral from n=Re_0 to (Re_0+Re)((Re_s~xdRe_s)/(Ar_(Δρ)-fRe_s~2)),对換热設备的換热能力和压降特性用四个无因次数加以統一描述[式(28),(29),(31)和式(36)]。将稀相換热与多层浓相流态化床比較时,本文为流速的非齐次性提出式(43)所表示的多层流态化床的热量回收率关系,使之可与稀相換热[式(26)和式(26a)进行直接比較]。在进行稀相換热扩大实驗后,将稀相技术应用于貧铁矿的磁化焙烧和含低品位銅鈷氧化鉄矿的硫酸化焙烧中間工厂中,并指出采用稀相換热的設备投资仅为习俗設备的一个很小的百分数。指出稀相技术是一个流态化冶金中正在开始发展的領域,其中許多問題尚待进一步的探索和研究。

An unconventional heat transfer problem is investigated analytically, The two dimensional trailing edge wake is established with two different uniform tempera tures above and below an insulated flat plate. As a result, the interaction between the temperature and flow fields can be developed only in the wake region without the interference from the upstream boundary layer heat transfer in the conventional heated wall cases. The present wake, thus generated. can be purely thermally stable or unstable...

An unconventional heat transfer problem is investigated analytically, The two dimensional trailing edge wake is established with two different uniform tempera tures above and below an insulated flat plate. As a result, the interaction between the temperature and flow fields can be developed only in the wake region without the interference from the upstream boundary layer heat transfer in the conventional heated wall cases. The present wake, thus generated. can be purely thermally stable or unstable in the whole wake region, with no mixture of stratification in the heated wake. Analytical results have been obtained from the similarity solution technique as well as the finite difference numerical analysis. Comparisons between those solutions for the same physical cases show excellent agreements.

This paper is concerned with how the Monte Carlo method is used to solve the radiative heat transfer problems of a cylindrical furnace. A double coordinate system is introduced. With this system, the directions of the radiant energy beams emitted by a cylindrical surface element can be determined by using the same formulas for a volume element. Formulas to calculate the beam lengths in a volume element is propsed by the authors in this paper. Besides, the direction angles of the radiative beam at the point...

This paper is concerned with how the Monte Carlo method is used to solve the radiative heat transfer problems of a cylindrical furnace. A double coordinate system is introduced. With this system, the directions of the radiant energy beams emitted by a cylindrical surface element can be determined by using the same formulas for a volume element. Formulas to calculate the beam lengths in a volume element is propsed by the authors in this paper. Besides, the direction angles of the radiative beam at the point where it passes through the interface between the elements are studied. A better way to follow the tracks of the beams element by element is put forward by the authors. As a result, the mathematical simulation of radiative heat transfer can be established easily using a computer. In industrial conditions, both radiative and convective heat transfer exists in the furnace, the absorbtion coefficients of the gases and flames are space variables, the walls are covered with ash desposits, and the surface temperatures are unknown. All these are considered by the authors in this paper. The distributions of the gas temperatures in the furnace and the surface heat fhaxes are obtained by their method.