TY - JOUR
T1 - A Novel Strong-Coupling Pseudo-Spectral Method for Numerical Studies of Two-Layer Turbulent Channel Flows
AU - Wu , Tong
AU - Yang , Zixuan
AU - Wang , Shizhao
AU - He , Guowei
JO - Communications in Computational Physics
VL - 3
SP - 1133
EP - 1146
PY - 2020
DA - 2020/07
SN - 28
DO - http://doi.org/10.4208/cicp.OA-2019-0124
UR - https://global-sci.org/intro/article_detail/cicp/17678.html
KW - Direct numerical simulation, coupled air-water turbulence, interface condition.
AB - <p style="text-align: justify;">A new method is proposed to simulate a coupled air-water two-layer turbulent channel flow. A numerically effective dynamic viscosity is implemented to calculate the viscous momentum flux at the interface, leading to a strong-coupling scheme
for the evolution of air and water motions. The direct numerical simulation results
are compared with those in the literature obtained from a weak-coupling scheme. It
is discovered that while the turbulence statistics of the air phase based on the strong- and weak-coupling schemes are close to each other, the results on the water side are
influenced by the coupling approach, especially near the water surface.</p>