Calculation of three-dimensional laminar flows in T-shaped junctions. (English) Zbl 0687.76035
Summary: A numerical study of three-dimensional laminar flow in rectangular bifurcating ducts with the branching flow at 90\(\circ\) to the main flow was performed. The full set of Navier-Stokes equations governing the flow was solved with an existing numerical iterative procedure appropriate for recirculating flows. The method uses primitive variables such as velocity and pressure. The results show that two recirculation zones are established, one near the bottom of the main duct opposite the bifurcation and the other in the branching duct close to the upstream side. One of the cases studied reproduces the conditions of existing two- dimensional measurements with good agreement. Pairs of streamwise vortices are generated downstream of the junction zone with their centers moving towards the symmetry plane. It is shown that strong three- dimensional flow is produced in the recirculation regions of the T-shaped junction, especially at low aspect ratios.
MSC:
| 76D10 | Boundary-layer theory, separation and reattachment, higher-order effects |
| 76M99 | Basic methods in fluid mechanics |
Keywords:
three-dimensional laminar flow; rectangular bifurcating ducts; Navier- Stokes equations; numerical iterative procedure; recirculation zones; T- shaped junctionReferences:
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