VISUALIZATION OF FLOW PATTERNS IN COOLING AND FREEZING PROCESSES OF WATER AROUND TWO HORIZONTAL TUBES

Narumi, Akira; Ohishi, Shigeo; Nakane, Ichirou; Kashiwagi, Takao

Transport Phenomena in Thermal Engineering. Volume 2

ISBN Druckformat: 1-56700-015-0

VISUALIZATION OF FLOW PATTERNS IN COOLING AND FREEZING PROCESSES OF WATER AROUND TWO HORIZONTAL TUBES

Akira Narumi Department of Mechanical Engineering, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Japan

Shigeo Ohishi Department of Mechanical Engineering, Kanagawa Institute of Technology, Atsugi, JAPAN

Ichirou Nakane Department of Mechanical Engineering, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Japan

Takao Kashiwagi Department of Mechanical System Engineering,Tokyo University of Agriculture and Technology, 2-24-16 Nakamachi, Koganei 184-8588, Japan

Abstrakt

This paper investigated the cooling and freezing processes of water around two horizontal tubes as basic research for an ice thermal storage system of the ice-on-coil type. The experiments were performed with varying cooling rates and distances between the two tubes. The processes were visualized and measured using mainly real-time laser holographic interferometry technique. As a result, the characteristic changes in flow patterns up to the release of supercooling could be found out.

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