Flow Visualization in a Tube Flow with Various Positions of the V-baffles
Keywords:
fully developed flow profile, V-baffle, circular tube, gap ratioAbstract
Flow configurations in a circular tube heat exchanger inserted with V-baffles are investigated numerically. The influences of the Reynolds numbers (Re = 3000 – 10000) and gap ratios (g/D = 0, 0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) are considered with the flow blockage ratio (b/D) of the baffle around 0.20 and flow attack angle around 45o. The numerical problem is solved with the finite volume method. The numerical results are reported in terms of velocity vectors in transverse plane and the variations of the u/u0 with various positions in the test tube. As the results, the flow profiles can separate into two parts; periodic flow profile and fully developed periodic flow profile. The reduction of the gap ratio effects for speed up rate of the fully developed periodic flow profile. The cognition of the flow structure in the tube heat exchanger inserted with the V-baffle can help to improve the accuracy of the computational domain.
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