Engineering, 22.04.2020 03:04 kdawg203

For an array of fins with total number of fins (N) being 11, the fin thickness (t) is0.182 mm. The pitch of the fins (S) is 1.982 mm. This is based on the constraintthat W = (N-1)×S + t. The other constraint dictating the dimensions is expressed as(S-t) = 1.8 mm. The forced convection heat transfer coefficient within thechannels and on the outside surfaces of the heat sink is at the same magnitude of100 [W/(m2·K)]. The fins have adiabatic tip. The heat transfer coefficient on theouter surfaces of the heat sink is also 100 [W/(m2·K)]. Assume the laminar flowin the channels is in the "combined entry regime" and therefore using thecorrelation of Baehr and Stephan ("Heat Transfer", 2nd edition, Publisher:Springer, 2006; also listed in Chapter 8 of your text book) calculate the value ofGraetz number (GzD) that is based on hydraulic diameter (D).

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For an array of fins with total number of fins (N) being 11, the fin thickness (t) is0.182 mm. The p...