Abstract
Flow around a two-dimensional circular cylinder of a stratified fluid with periods buoyancy Tb = 25.2 and 6.28 sec is studied numerically over a wide range of Reynolds and Froude numbers. It is found that in the presence of a perturbation ahead of a cylinder which moves downstream with increasing Reynolds number, the salinity isolines have the shape of a semi-circular comb with sharp teeth. The shape change of the attached waves and the occurrence of fluid layers of different densities in the cylinder wake are studied. In flows with a buoyancy period Tb = 6.28 sec at Reynolds numbers Re < 60, stagnant zones are found in the cylinder wake, and at Re > 60, these zones are absent.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 52, No. 6, pp. 69–76, November–December, 2011.
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Gushchin, V.A., Rozhdestvenskaya, T.I. Numerical study of the effects occurring near a circular cylinder in stratified fluid flows with short buoyancy periods. J Appl Mech Tech Phy 52, 905–911 (2011). https://doi.org/10.1134/S0021894411060083
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DOI: https://doi.org/10.1134/S0021894411060083