Temperature Fields Of Components Research Articles

Mathematical description of the heat generation by means of the railway transport vehicle wheel interaction and tracks

Temperature fields of components in relative sliding motion of the wheel-rail system can be analysed on the quasistationary approach

A Lattice Boltzmann Method for a Binary Miscible Fluid Mixture and Its Application to a Heat-Transfer Problem

A lattice Boltzmann method (LBM) for an isothermal binary miscible fluid mixture is proposed. The binary miscible fluid mixture is assumed to be composed of A and B species where the fraction of B species is much smaller than that of A species. The asymptotic theory proposed by Sone [in Rarefied Gas Dynamics, edited by D. Dini (Editrice Tecnico Scientifica, Pisa, 1971), Vol. 2, p. 737] is applied to the present LBM model and the convection–diffusion equation for component B is obtained. A diffusion problem is calculated and the validity of the proposed model is shown. Also, the present method can be applied to thermal fluid systems, in which the concentration field of component B is regarded as the temperature field of component A, and a buoyancy force proportional to the temperature difference is included. Rayleigh–Bénard convection is numerically simulated. The results indicate that the present LBM is useful for the simulation of fluid flows with heat transfer as well as mass transfer.

Determination of temperatures for sliding contact with applications for wheel-rail systems

Contact temperatures and temperature fields of components in relative sliding motion can be analyzed by Laplace transforms and the method of Green's functions. For the case of constant and ellipsoidal pressure distribution the temperatures obtained agree with the results of earlier work. The solution technique can also be used to solve arbitrary pressure distributions, which, coupled with the general normal contact problem, leads to extended solutions. The case of loadings with fluctuations due to surface roughness and indents are investigated. It can be shown that each kind of fluctuation causes a rise of the maximum contact temperature. All applications are for wheel-rail systems. The results are discussed.

Effect of the thermophysical characteristics of materials on the temperature field in components in local heating

Effect of the thermophysical characteristics of materials on the temperature field in components in local heating