مورد إلكتروني
Heat transfer and fluid flow characteristics of synthetic jets
| العنوان: | Heat transfer and fluid flow characteristics of synthetic jets |
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| بيانات النشر: | Curtin University 2009 |
| تفاصيل مُضافة: | Jagannatha, Deepak |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | This thesis presents a fundamental research investigation that examines the thermal and fluid flow behaviour of a special pulsating fluid jet mechanism called synthetic jet. It is envisaged that this novel heat transfer enhancement strategy can be developed for high-performance heat sinks in electronic cooling applications.The study considers a unique arrangement of a periodic jet induced by diaphragm motion within a cavity and mounted on a confined flow channel with a heated wall upon which the jet impingement occurs. The operation of this jet mechanism is examined as two special cases for unravelling its parametric influences. In Case (a), the jet impingement is analysed in a channel with stagnant fluid permitting clear view of the pure synthetic jet process and its controlling variables. In Case (b), jet impingement is considered with fluid flow in the channel to establish the nature of synthetic jet and cross-flow interaction.The unsteady flow of this jet mechanism is simulated as a time-dependant two-dimensional numerical model with air as the working fluid. The current model considers a solution domain in its entirety, comprising the confined flow regions of the jet impinging surface, the cavity and the orifice. With a User Defined Function (UDF), the model accounts for the bulk fluid temperature variations during jet operation, which has been grossly ignored in all published work. Overcoming previous modelling limitations, the current simulation includes flow turbulence for realistic representation of pulsed jet characteristics and cross-flow interference.Computations are performed with applicable boundary conditions to obtain the heat transfer and fluid flow characteristics of the synthetic jet along with cross-flow interaction for the diaphragm amplitude ranging from 0.5 mm to 2 mm and the diaphragm frequency varying from 250 Hz to 1000 Hz. The numerical simulation yields stable solutions and aptly predicts the sequential formation of synthetic jet and its |
| مصطلحات الفهرس: | jet impingement, synthetic jet, synthetic jet-cross flow hybrid mechanism, diaphragm motion, parametric influences, thermal and fluid flow behaviour, electronic cooling applications, high-performance heat sinks, heat transfer enhancement strategy, Thesis |
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| الإتاحة: | Open access content. Open access content |
| أرقام أخرى: | LC0 oai:espace.curtin.edu.au:20.500.11937/2437 1262545093 |
| المصدر المساهم: | CURTIN UNIV OF TECH From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.on1262545093 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |