Record Details

Investigation of Thermocapillary Convection of High Prandtl Number Fluid Under Microgravity
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Author and Affiliation:
Liang, Ruquan(Northeastern Univ., Key Lab. of National Education Ministry for Electromagnetic Processes of Materials, Shenyang, China);
Duan, Guangdong(Northeastern Univ., Key Lab. of National Education Ministry for Electromagnetic Processes of Materials, Shenyang, China)
Abstract: Thermocapillary convection in a liquid bridge, which is suspended between two coaxial disks under zero gravity, has been investigated numerically. The Navier-Stokes equations coupled with the energy conservation equation are solved on a staggered grid, and the level set approach is used to capture the free surface deformation of the liquid bridge. The velocity and temperature distributions inside the liquid bridge are analyzed. It is shown from this work that as the development of the thermocapillary convection, the center of the vortex inside the liquid bridge moves down and reaches an equilibrium position gradually. The temperature gradients in the regions near the upper center axis and the bottom cold corner are higher than those in the other regions.
Publication Date: Sep 01, 2012
Document ID:
20120015603
(Acquired Nov 13, 2012)
Subject Category: FLUID MECHANICS AND THERMODYNAMICS
Document Type: Conference Paper
Publication Information: Materials Research in Microgravity 2012; 177-184; (NASA/CP-2012-217466); (SEE 20120015582)
Contract/Grant/Task Num: NNSFC 11072057; NSF 20092002
Financial Sponsor: NASA Marshall Space Flight Center; Huntsville, AL, United States
National Natural Science Foundation of China; Liaoning, China
Organization Source: Northeastern Univ.; Key Lab. of National Education Ministry for Electromagnetic Processes of Materials; Shenyang, China
Description: 8p; In English; Original contains black and white illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: CONSERVATION EQUATIONS; MICROGRAVITY; NAVIER-STOKES EQUATION; SURFACE TENSION DRIVEN CONVECTION; THERMOCAPILLARY MIGRATION; LIQUID BRIDGES; NUMERICAL ANALYSIS; MATHEMATICAL MODELS; TIME DEPENDENCE; PRANDTL NUMBER; VELOCITY; TEMPERATURE; SINGLE CRYSTALS
Miscellaneous Notes: Sponsored in part by the Natural Science Foundation of Liaoning
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