FLUID-FLOW AND HEAT-TRANSFER FOR TUBE ROW S AND BUNDLES AT LOW VALUESOF THE REYNOLDS-NUMBER .3. FLOW AROUND AND IN TUBE BUNDLES IN AN INFINITE SURROUNDING FOR DIFFERENT ARRANGEMENTS OF THE TUBES

In this part of the investigation fluid flow around two different arra ngements of tubes in an infinite surrounding and heat transfer is cons idered. With a finite element method the velocity, pressure and temper ature field are calculated. The results are discussed and compared wit h the results of the preceeding parts. Streamline plots show that the fluid is flowing primarily around the tube arrangement. Only to a lase r degree is the fluid flowing through the arrangement. In the range of low values of the Reynoldsnumber the tube arrangement is a compact ob stacle to the flowing fluid. This has also a very pronounced effect on heat transfer.