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S7 Empacotamento Eletrônico |
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Title:
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NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE NATURAL CONVECTION IN CAVITIES WITH PROTRUDING HEAT SOURCES AT THE BASE
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Summary :
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ABSTRACT. IN THIS WORK A NUMERICAL AND EXPERIMENTAL ANALYSIS OF THE NATURAL CONVECTION IN A CAVITY WITH PROTRUDING HEAT SOURCES MOUNTED ON THE BASE AND COOLED LATERALLY IS PERFORMED. IN THE NUMERICAL SOLUTION THE FLOW IS ASSUMED IN STEADY STATE, LAMINAR AND TWO-DIMENSIONAL. THE FLUID PHYSICAL PROPERTIES DO NOT VARY WITH TEMPERATURE, THERMAL RADIATION IS NEGLECTED AND THE BOUSSINESQ APPROXIMATION IS ADOPTED. THE FINITE VOLUME METHOD IS EMPLOYED FOR THE DISCRETIZATION OF THE EQUATIONS AND THE NUMERICAL SOLUTION IS OBTAINED BY USING THE SIMPLE ALGORITHM. THE VELOCITY AND TEMPERATURE FIELDS IN THE FLOW ARE OBTAINED. IN THE EXPERIMENTAL WORK, THE TEMPERATURES ARE MEASURED BY MEANS OF THERMOCOUPLES FIXED IN THE UPPER AND LOWER SURFACES AND ALSO BY MEANS OF A TRAVERSING PROBE THAT ALLOWS TO TAKE MEASUREMENTS IN THE FLOW FIELD. THE EFFECT OF THE SOURCES DISSIPATION RATES, THE CAVITY ASPECT RATIO AND THE LATERAL WALLS TEMPERATURE ON THE SOURCES TEMPERATURE IS OBSERVED. THE TEMPERATURE PROFILES IN THE CAVITY FLOOR, AS WELL THE FLOW FIELD TEMPERATURES ARE TRACED AND A REASONABLE AGREEMENT BETWEEN NUMERICAL AND EXPERIMENTAL RESULTS WAS FOUND.
KEY WORDS: NATURAL CONVECTION, ELECTRONIC COMPONENTS, THERMAL CAVITY.
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Author :
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Campos, Gabriel C.
Milanez, Luiz Fernando
Ramos, Ricardo Alan Verdú
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Paper View :
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