MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE.

Cholik Chan, J. Mazumder

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

One-dimensional transient and steady-state models describing the process of material removal by vaporization and liquid expulsion using a concentrated heat source are developed and presented. Before melting occurs, the conduction has a known analytical similarity solution. This provides the initial temperature field for the melting problem. Before vaporization occurs, the heat transfer in liquid and solid phases is solved by moving boundary immobilization transformation so that the liquid and solid regions become fixed domains. When vaporization commences, there exists a discontinuity across the Knudsen layer of a few molecular mean free paths. This discontinuity is modeled by a Mott-Smith type solution. The vaporization process creates a recoil pressure which pushes the vapor away from the target and expels the liquid. The materials are, therefore, removed in both vapor and liquid phases. The materials removal rates are incorporated in the moving boundary immobilization transformation. The vapor phase is assumed to be optically thin so that its absorption of the high energy beam is negligible. Finite difference solution is obtained for the transient model. Closed form analytical solutions are obtained for the steady-state.

Original languageEnglish (US)
Title of host publicationUnknown Host Publication Title
PublisherASME
Pages283-292
Number of pages10
Volume3
StatePublished - 1987
Externally publishedYes

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Vaporization
Liquids
Vapors
Melting
Temperature distribution
Hot Temperature
Heat transfer

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Chan, C., & Mazumder, J. (1987). MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE. In Unknown Host Publication Title (Vol. 3, pp. 283-292). ASME.

MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE. / Chan, Cholik; Mazumder, J.

Unknown Host Publication Title. Vol. 3 ASME, 1987. p. 283-292.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Chan, C & Mazumder, J 1987, MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE. in Unknown Host Publication Title. vol. 3, ASME, pp. 283-292.
Chan C, Mazumder J. MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE. In Unknown Host Publication Title. Vol. 3. ASME. 1987. p. 283-292
Chan, Cholik ; Mazumder, J. / MATERIALS REMOVAL BY VAPORIZATION AND LIQUID EXPULSION USING A CONCENTRATED HEAT SOURCE. Unknown Host Publication Title. Vol. 3 ASME, 1987. pp. 283-292
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