BACKGROUND: The microchannel heat exchange system has several advantages and can be used to enhance heat transfer for vitrification. OBJECTIVE: To evaluate the microchannel cooling method and to analyze the effects of key parameters such as channel structure, flow rate
and sample size. MATERIALS AND METHODS: A computational flow dynamics model is applied to study the two-phase flow in microchannels and its related heat transfer process. The fluid-solid coupling problem is solved with a whole field solution method (i.e., flow profile in channels and
temperature distribution in the system being simulated simultaneously). RESULTS AND CONCLUSION: Simulation indicates that a cooling rate >104 ºC/min is easily achievable using the microchannel method with the high flow rate for a board range of sample sizes. Channel
size and material used have significant impact on cooling performance. Computational flow dynamics is useful for optimizing the design and operation of the microchannel system.
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COMPUTATIONAL FLOW DYNAMICS;
Document Type: Research Article
January 1, 2018
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CryoLetters is a bimonthly international journal for low temperature sciences, including cryobiology, cryopreservation or vitrification of cells and tissues, chemical and physical aspects of freezing and drying, and studies involving ecology of cold environments, and cold adaptation
The journal publishes original research reports, authoritative reviews, technical developments and commissioned book reviews of studies of the effects produced by low temperatures on a wide variety of scientific and technical processes, or those involving low temperature techniques in the investigation of physical, chemical, biological and ecological problems.