Dresden 2017 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 62: Microstructure and Phase Transformations - nucleation kinetics and pressure effects

MM 62.3: Vortrag

Donnerstag, 23. März 2017, 12:15–12:30, IFW B

Thin interface asymptotics in the presence of convection for diffuse interface models of solidification — •Amol Subhedar, Fathollah Varnik, and Ingo Steinbach — ICAMS, Ruhr Universität Bochum, Germany

As a major transport mechanism, convection plays a critical role in the solidification phenomena. Here, the influence of convection on diffuse interface models of solidification is investigated both analytically and via numerical simulations. It is shown that results of the diffuse interface width become independent of the auxiliary interface width, as also shown in the absence of flow (A. Karma and W. Rappel, Phys. Rev. E, 53, p. 4323 (1996)). Analytic predictions are found to be quantitatively in line with the results obtained from extensive numerical simulations for various fluid-solid coupling schemes. This underlines the generic character of the results and highlights the broad range of its applicability to various available models of solidification in the presence of flow [A. Subhedar, I. Steinbach, F. Varnik, in preparation].