Dual solutions of the flow through a curved tube
1989; IOP Publishing; Volume: 5; Issue: 3 Linguagem: Inglês
10.1016/0169-5983(89)90021-x
ISSN1873-7005
AutoresShinichiro Yanase, Nozomi Goto, Kyoji Yamamoto,
Tópico(s)Nanofluid Flow and Heat Transfer
ResumoDual solutions, i.e. two-vortex and four-vortex solutions, and their stability of flow through a slightly curved circular tube are numerically investigated by the spectral method in the range 96 ⩽ Dn ⩽ 10000, where Dn is the Dean number. It is found that the two-vortex solution is stable in response to any small disturbances, while the four-vortex solution is unstable to asymmetric disturbances. Time evolution of the unsteady four-vortex flow is also studied by a numerical simulation of the Navier-Stokes equation when Dn = 1000. The four-vortex flow eventually turns into a two-vortex flow.
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