ISSN Online: 2377-424X
ISBN Print: 0-89116-559-2
International Heat Transfer Conference 8
EXPERIMENTAL STUDY OF THERMALLY STRATIFIED UNSTEADY FLOW BY NMR-CT
要約
Thermally stratified unsteady flow caused by two-dimensional surface discharge of warm water into a rectangular reservoir is investigated. The basic objectives are to develop a measurement system for the unsteady flow phenomena and to study the interfacial mixing between a flowing layer of warm water and the underlying body of cold water at small Richardson number.
Mean velocty field measurement is carried out by using NMR-CT (Nuclear Magnetic Resonance-Computerized Tomography). It detects quantitative flow image of any desired section in any direction of flow in short time. Transient mean temperature profiles are obtained by fine thermocouple arrays and a microcomputer-based data acqusition system.
Results show that the warm layer penetrates more rapidly into the cold layer at smaller Richardson number because of decrease of its stability, which is clearly verified by flow visualization using thymol blue solution. It is found that the transport of heat across the interface is more vigorous than that of momentum.
Mean velocty field measurement is carried out by using NMR-CT (Nuclear Magnetic Resonance-Computerized Tomography). It detects quantitative flow image of any desired section in any direction of flow in short time. Transient mean temperature profiles are obtained by fine thermocouple arrays and a microcomputer-based data acqusition system.
Results show that the warm layer penetrates more rapidly into the cold layer at smaller Richardson number because of decrease of its stability, which is clearly verified by flow visualization using thymol blue solution. It is found that the transport of heat across the interface is more vigorous than that of momentum.