in this paper, we present a fractional mathematical model of a one-dimensional phase phase change problem (stefan problem) with latent heat a power function of position. this model includes space-time fractional derivatives in caputo sense and time dependent surface heat flux. an approximate solution of this model is obtained by optimal homotopy asymptotic method (oham) to find an approximate s...

The present paper evaluates the effect of the nozzle characteristics on the heat transfer and phase change of the low carbon steel during the continuous casting process. A three-dimensional energy equation and a solidification model are used to drive the governing equation of the phase change and temperature distribution. A linear relation is obtained to predict the temperature-dependent of the...

the aim of this paper is to enhance thermal performance of a microchannel heat sink by using nanoencapsulated phase change material (nepcm) slurry as a cooling fluid instead of pure fluid. a threedimensional model of a circular channel using water slurry of nepcm was developed. the results show a significant reduction in the mean fluid temperature along the channel and heat sink wall temperatu...

In numerical welding modelling, it is critically important to adopt a heat source model that fits the actual process since has significant influence on calculation accuracy of transient temperature field, especially near source. An inappropriate can produce an overestimated or underestimated leading displacement field errors in mechanical analysis. this study, new non-linear peridynamic employi...

today’s challenge is learning about how to live with the change instead of planning for it and the critical point that causes the organizational change programs to fail is the lack of integrated conceptual model. to face this issue, the article has a literature review to develop a holographic model. in this model. content analysis has been used in this article. theresult was a holographic model...