TY - JOUR
T1 - Two-dimensional turbulence in square and circular domains with no-slip walls
AU - Clercx, H.J.H.
AU - Nielsen, A.H.
AU - Torres, D.J.
AU - Coutsias, E.A.
PY - 2001
Y1 - 2001
N2 - Several fascinating phenomena observed for 2D turbulence in bounded domains are discussed. The first part of this paper concerns a short overview of the non-trivial behaviour of freely evolving 2D turbulence in square domains with no-slip boundaries. In particular, the Reynolds number dependence of, and the influence of the initial conditions on spontaneous spin-up of the flow, which is characterised by a sudden increase of the absolute value of the angular momentum of the flow, is investigated in more detail. In a second set-up we have investigated forced 2D turbulence in circular containers with no-slip walls. A comparison with the double periodic case reveals that domain-filling structures, always observed in the double periodic cases, are being prevented from emerging. Wall-generated, small-scale structures are continuously injected into the interior of the domain, destroying larger structures and maintaining the turbulent flow field.
AB - Several fascinating phenomena observed for 2D turbulence in bounded domains are discussed. The first part of this paper concerns a short overview of the non-trivial behaviour of freely evolving 2D turbulence in square domains with no-slip boundaries. In particular, the Reynolds number dependence of, and the influence of the initial conditions on spontaneous spin-up of the flow, which is characterised by a sudden increase of the absolute value of the angular momentum of the flow, is investigated in more detail. In a second set-up we have investigated forced 2D turbulence in circular containers with no-slip walls. A comparison with the double periodic case reveals that domain-filling structures, always observed in the double periodic cases, are being prevented from emerging. Wall-generated, small-scale structures are continuously injected into the interior of the domain, destroying larger structures and maintaining the turbulent flow field.
U2 - 10.1016/S0997-7546(01)01130-X
DO - 10.1016/S0997-7546(01)01130-X
M3 - Article
SN - 0997-7546
VL - 20
SP - 557
EP - 576
JO - European Journal of Mechanics. B, Fluids
JF - European Journal of Mechanics. B, Fluids
IS - 4
ER -