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Ram Dayal
Center of Smart Interfaces, Technische Universität Darmstadt, Petersenstr. 3264287 Germany ; Institute of Technical Thermodynamics, Technische Universitat Darmstadt, Petersenstr. 17, 64287 Germany; School of Automobile, Mechanical and Mechatronics Engineering, Manipal University Jaipur, India

Tatiana Gambaryan-Roisman
Institute of Technical Thermodynamics and Center of Smart Interfaces, Technische Universitat Darmstadt, Alarich-Weiss-Str. 10, 64287, Darmstadt, Germany

Eberhard Abele
Center of Smart Interfaces, Technische Universität Darmstadt; Institute of Production Management, Technology and Machine Tools, Technische Universität Darmstadt, 64287 Germany


Flow and heat transfer during selective laser sintering of metal powder is investigated numerically. Heat transfer, melting and resolidification, which are induced by laser irradiance and coupled with coalescence of partially melted particles, are dominant processes governing laser sintering of metal powders. The present model accounts for phase change during the laser heating and cooling cycle and subsequent melt flow due to surface tension forces. The study is aimed to gain understanding of mechanisms governing microstructure formation during selective laser sintering. A two-dimensional boundary element (BEM) model is used to solve the governing equations. The solid-liquid interface during phase change is tracked using Stefan condition at the interface. The liquid melt formed due to melting is assumed to be viscous. The influence of process parameters on temperature field evolution, shape evolution and densification rate is quantified and discussed.

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Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH