Experimental and numerical studies of forced convectionheat transfer in tube-type heat exchangerudconsisting four columns of five cylindrical tubes arranged so that every second column is displaced (i.estaggeredudconfiguration) were carried out. Experiments were conductedtodeterminethe effects of flow pattern on heatudtransfer and pressure dropwithin the heat exchanger and the heat transfer dependence on position. In theudanalytical approach, the dimensionless representationsof the rates of forced convection (i.eNusselt number) andudpressure loss(i.e drag coefficient) were obtained. The numerical simulation is carried out using FEMLAB 3.0udand the results compared favourably with the experimental. The flow visualization featuressuch as boundaryudlayer developments between tubes, formation of vortices, local variations of the velocity and temperatureuddistribution within the heat transfer device were revealed by numerical solution. The resultsshowed that theudaverage Nusselt number increases with increasing Reynolds number and the heated element position in theudbank. The drag coefficient decrease with increasing Reynolds numbers.
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