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Three-dimensional computational modeling of momentum, heat, and mass transfer in a laser surface alloying process

Sarkar, S and Raj, Mohan P and Chakraborty, S and Dutta, P (2002) Three-dimensional computational modeling of momentum, heat, and mass transfer in a laser surface alloying process. In: Numerical Heat Transfer Part A, 42 (3). pp. 307-326.

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Official URL: http://tandfprod.literatumonline.com/doi/abs/10.10...

Abstract

A three- dimensional, transient model is developed for studying heat transfer, fluid flow, and mass transfer for the case of a single- pass laser surface alloying process. The coupled momentum, energy, and species conservation equations are solved using a finite volume procedure. Phase change processes are modeled using a fixed-grid enthalpy-porosity technique, which is capable of predicting the continuously evolving solid- liquid interface. The three- dimensional model is able to predict the species concentration distribution inside the molten pool during alloying, as well as in the entire cross section of the solidified alloy. The model is simulated for different values of various significant processing parameters such as laser power, scanning speed, and powder feedrate in order to assess their influences on geometry and dynamics of the pool, cooling rates, as well as species concentration distribution inside the substrate. Effects of incorporating property variations in the numerical model are also discussed.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Taylor and Francis Group.
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 27 Jul 2011 10:05
Last Modified: 27 Jul 2011 10:05
URI: http://eprints.iisc.ernet.in/id/eprint/39499

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