Visualization Studies of Heat and Mass Transfer in Forced Flow He II

职务名称： 强制流动中传热传质的可视化研究 Steven W.货车Sciver，佛罗里达州立大学建议编号：CTS-0001411摘要这项工作涉及流动显示和粒子图像测速技术（PIV）的应用，以研究在He II的传热和传质。 其目的是获得的能力，调查微观尺度的热流体问题，在He II，使流体可以更好地利用作为冷却剂的应用。这项工作将首先集中在技术，以引入合适的中性密度粒子与He II逆流/强制流动通道的实验。待研究的中性粒子包括固体H2/D2和中空玻璃微球。 一旦粒子播种技术已经开发出来，PIV实验将研究He II通道的微尺度流体动力学。实验将在配备光学通路的低温恒温器中进行。 如果成功，这将是首次在He II中进行PIV演示，也是唯一一次在逆流或强制流He II中进行粒子成像研究。 这也将是一个明确的指示价值的PIV的低温热流体研究。

Title: Visualization Studies of Heat and Mass Transfer in Forced Flow He IIPI: Steven W. Van Sciver, Florida State UniversityProposal Number: CTS-0001411AbstractThis work involves the application of flow visualization and particle image velocimetry (PIV) techniques to studies of heat and mass transfer in He II. The purpose is to obtain the capability to investigate microscopic scale thermal fluid issues in He II, so that the fluid can be better utilized as a coolant in applications. The effort will first focus on techniques to introduce suitable neutral density particles into experiments with a He II counterflow/forced flow channel. Neutral particles to be investigated include solid H2/D2 and hollow glass microspheres. Once particle seeding techniques have been developed, PIV experiments will investigate the microscale fluid dynamics of the He II channel. The experiments will be performed in a cryostat equipped with optical access. If successful, this will be the first demonstration of PIV in He II and the only particle imaging study in counterflow or forced flow He II. It will also be a clear indication of the value of PIV for cryogenic thermal fluid studies.