Cx. Xu et al., MECHANISM FOR STRONG NORMAL VELOCITY FLUCTUATIONS IN VISCOUS SUBLAYER, Science in China. Series A, Mathematics, Physics, Astronomy & Technological Sciences, 39(5), 1996, pp. 520-527
The spike phenomena, namely strong normal velocity fluctuations, in th
e viscous sublayer have been discovered through detailed investigation
of the databank of the direct numerical simulation of a turbulent cha
nnel flow. Their characteristic features are disclosed and their effec
ts on the generation of turbulence, and correlation with the vortex st
ructures are studied.