TECHNICAL PAPERS: Fluids/Heat/Transport

Freezing by a Flat, Circular Surface Cryoprobe of a Tissue Phantom With an Embedded Cylindrical Heat Source Simulating a Blood Vessel

[+] Author and Article Information
Loay Massalha, Avraham Shitzer

Department of Mechanical Engineering, Technion, Israel Institute of Technology, Haifa, Israel 32000

J Biomech Eng 126(6), 736-744 (Feb 04, 2005) (9 pages) doi:10.1115/1.1824119 History: Received August 03, 2003; Revised June 13, 2004; Online February 04, 2005
Copyright © 2004 by ASME
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Schematic view of the experimental setup
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Cross-section of the phase-changing test section
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View of the thermocouple wires and the produced frozen lump immediately after removal of the cryoprobe and the PCM (experiment without the embedded heat source)
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Schematic locations of the thermocouple wires in the phase-changing solution
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Typical temperature variations at the surface of the cryoprobe for all test conditions
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Temperature distributions in the phase changing medium without the cylindrical heat source after 1120 seconds
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A comparison of the 0°C isotherms at sections A and E for a 160° rotation of the cryoprobe
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0°C (All sections) and −60°C [sections (b)-(d), only] isotherms shown at 1120 s after commencement of the freezing process
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Evolution of the 0°C isotherm in the region behind the heat source. Circles and plus-signs indicate locations of thermocouples and their symmetrical images, respectively.
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Three-dimensional views of the progression of the 0°C isothermal surface (“phase change” front) in the vicinity of the circular heat source
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Two-dimensional side views of the 0°C isotherms at different instances showing the effect of the heat source on the progression of the phase change front
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Water temperature distributions in the embedded cylindrical heat source




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