Transcription of Conduction Heat transfer: Unsteady state
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Conduction Heat transfer: Unsteady state
Conduction heat transfer : Unsteady stateChapter ObjectivesFor solving the situations that Where temperatures do not change with position. In a simple slab geometry where temperature vary also with position. Near the surface of a large body (semi infinite region)Keywords Internal resistance External resistance Biot number Lumped parameter anaysis 1D and multi dimensional heat Conduction Heisler charts Semi infinite region1 Lumped Parameter AnalysisIn transient, Tr=rTr=0Tr= 1. Several temperatures in the Parameter AnalysisFigure 2. A solid with convection over its surface.) tThA(T TmCp (1)) ThA(T TmCp M : MassCp: Specific heath : Convective heat transfer coefficientA : Surface areaT : Bulk fluid temperature(1)(2)Lumped Parameter Analysis(3)Lumped Parameter Analysis(5)(4)2 Biot NumberTr=rTr= 3.
5 Transient Heat Transfer in a Semi‐ infinite Region •A semi‐infinite region extends to infinity in two directions and a single identifiable surface in the other direction •You can see Fig. 5.11 extends to infinity in the y and z directions and has an identifiable surface at x=0 Figure 12.
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