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Unformatted text preview: CBE 320 November 9, 2009 Transport Phenomena Problem Session XI Part A: Interphase Energy Transport 1. Solve the fin problem described in Section 10.7 using the equations of change derived in Chapter 11. Note that in order to obtain Eq. 10.7-3, the heat transfer from the faces must be incorporated into the energy equation (e.g., Eq. 11.2-10) as a source term. Obtain Eq. 10.7-3 using the equations of change from Chapter 11, and obtain the steady-state temperature distribution in the fin. 2. Work problem 14A.1 in BSL. 1 Solutions HW 11B Solutions (1.) The first step is to determine the source term, S . This is the rate of energy produced per unit volume. For the fin, this energy “production” is actually an energy “loss” rate from the fin faces. The term S must describe the rate of energy production from the faces, to the ﬂuid, per unit volume of fin material. To obtain this, consider a section of the fin Δ z as we did in the shell balance. The energy production rate per unit volume isas we did in the shell balance....
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- Fall '08
- Thermodynamics, fin, energy production, unit volume, Interphase Energy Transport