A biological fluid moves at a flow rate of through a
Chapter 9, Problem 9.72(choose chapter or problem)
A biological fluid moves at a flow rate of through a coiled, thin-walled, 5-mm-diameter tube sub- merged in a large water bath maintained at 50?C. Thefluid enters the tube at 25?C.(a) Estimate the length of the tube and the number ofcoil turns required to provide an exit temperature ofTm,o?38?C for the biological fluid. Assume thatthe water bath is an extensive, quiescent medium that the coiled tube approximates a horizontal tube,and that the biological fluid has the thermophysicalproperties of water.(b) The flow rate through the tube is controlled by apump that experiences throughput variations ofapproximately?10% at any one setting. This con-dition is of concern to the project engineer becausethe corresponding variation of the exit temperatureof the biological fluid could influence the down-stream process. What variation would you expectin Tm,ofor a?10% change in ?
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