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TECHNICAL PAPERS: Max Jacob Award

Thermal Processing of Materials: From Basic Research to Engineering

[+] Author and Article Information
Yogesh Jaluria

Department of Mechanical and Aerospace Engineering, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903

J. Heat Transfer 125(6), 957-979 (Nov 19, 2003) (23 pages) doi:10.1115/1.1621889 History: Received March 21, 2003; Revised June 12, 2003; Online November 19, 2003
Copyright © 2003 by ASME
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References

Figures

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Sketches of a few common manufacturing processes that involve thermal transport in the material being processed: (a) optical fiber drawing; (b) chemical vapor deposition; (c) Czochralski crystal growing; and (d) plastic screw extrusion.
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Various steps involved in the design and optimization of a thermal system and in the implementation of the design
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Screw channel and simplified computational domain for a single-screw extruder
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Calculated velocity and temperature fields in the channel of a single screw extruder at n=0.5 and dimensionless throughput qv=0.3, for typical operating conditions
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Schematic diagram of the cross-section of a tangential twin screw extruder, showing the translation (T) and intermeshing, or mixing (M), regions
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Mesh discretization for the mixing region in a co-rotating tangential twin screw extruder, along with typical computed results for low density polyethylene (LDPE) at n=0.48, barrel temperature, Tb=320°C, inlet temperature, Ti=220°C,N=60 rpm,qv=0.3
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Calculated (a) streamfunction, (b) vorticity, (c) viscous dissipation, and (d) temperature contours in the optical fiber drawing process for typical drawing conditions
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(a) Iterative convergence of the neck-down profile in optical fiber drawing; (b) results for different starting profiles. Here, r*=r/R and z*=z/L, where R is the preform radius, and L the furnace length.
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Experimental and numerical results for water solidification driven by convection and conduction
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(a) Flow in the ambient fluid due to a continuously moving material; (b) dimensionless velocity (u/Us) distribution in the fluid due to a vertically moving heated plate with aiding buoyancy effects
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Comparisons between the numerical results on predicted film growth rate and the experimental data of 61
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Comparison between experimental observations and numerical predictions of streamlines at Re=9.48 and Re=29.7 for a ceramic susceptor
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Comparisons between numerical and experimental results on temperature profiles for Viscasil-300M, with (a) and (c) from the three-dimensional (FEM) model and (b) and (d) from the two-dimensional (FDM) model. For (a) and (b): Ti=20.3°C,Tb=12.2°C,N=20. For (c) and (d): Ti=18.8°C,Tb=22.3°C,N=35.
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(a) Experimental arrangement for velocity measurements in the flow of corn syrup in a twin-screw extruder; (b) comparison between calculated and measured tangential velocity Ux profiles for isothermal heavy corn syrup at 26.5°C, with mass flow rate of 6 kg/hr and screw speed of 30 rpm
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Comparison of the numerical predictions of (a) the neck-down profile and (b) the draw tension with experimental results from 7677
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Comparison between measured and predicted interface locations during (a) melting, and (b) solidification of pure tin from a vertical surface 7879
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Feasible domain for twin-screw extrusion of starch
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Results obtained from a feasibility study of the optical fiber drawing process: (a) different cases studied, showing both feasible and infeasible combinations of parameters; (b) “iso-tension” contours for the feasible range of fiber drawing; (c) feasible domain at a draw speed of 15 m/s in terms of furnace length and temperature
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Evaluation of optimal draw temperature at a draw speed of 15 m/s and the optimal draw speed at a draw temperature of 2489.78 K, obtained in the first part, by using the golden-section search method
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Different mathematical models for ingot casting: (a) Chvorinov model; (b) lumped mold model; and (c) semi-infinite model
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Results for design of an ingot casting system, showing solid-liquid interface movement with time and switching to a more complex model after many design trials

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