For heat transfer coupled with fluid flow, formulate appropr

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For heat transfer coupled with fluid flow, formulate appropriate answers to the following questions: (a) Why is a compac

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For heat transfer coupled with fluid flow, formulate appropriate answers to the following questions: (a) Why is a compact heat exchanger different from a conventional heat exchanger? (b) Symmetricandcyclic boundaryconditionscan usually beemployedto simplifythe flow geometry of a compact heat exchanger. Indicatethe boundary conditions for the in-line and staggered arrangements shown below. (c) The Nusselt number is a ratio of two fluid properties. What are they? (d) Explain why higher heat-transfer rates are experienced in a staggered arrangement than in an in-line arrangement. (e) What is conjugate heat transfer? (f) Why is it important to incorporate the buoyancy effect in natural convection? What additional modeling effort is required for the transport equations? (g) What is radiation heat transfer? How does it affect the surface solid temperature (see section 7.4.1.2)?

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