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Volume 28, Issue 3
A Novel Strong-Coupling Pseudo-Spectral Method for Numerical Studies of Two-Layer Turbulent Channel Flows

Tong Wu, Zixuan Yang, Shizhao Wang & Guowei He

DOI: 10.4208/cicp.OA-2019-0124

Commun. Comput. Phys., 28 (2020), pp. 1133-1146.

Published online: 2020-07

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  • Abstract

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.

  • Keywords

Direct numerical simulation, coupled air-water turbulence, interface condition.

  • AMS Subject Headings

76F65

  • Copyright

COPYRIGHT: © Global Science Press

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@Article{CiCP-28-1133, author = {Wu , TongYang , ZixuanWang , Shizhao and He , Guowei}, title = {A Novel Strong-Coupling Pseudo-Spectral Method for Numerical Studies of Two-Layer Turbulent Channel Flows}, journal = {Communications in Computational Physics}, year = {2020}, volume = {28}, number = {3}, pages = {1133--1146}, abstract = {

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.

}, issn = {1991-7120}, doi = {https://doi.org/10.4208/cicp.OA-2019-0124}, url = {http://global-sci.org/intro/article_detail/cicp/17678.html} }
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 -

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.

Wu , TongYang , ZixuanWang , Shizhao and He , Guowei. (2020). A Novel Strong-Coupling Pseudo-Spectral Method for Numerical Studies of Two-Layer Turbulent Channel Flows. Communications in Computational Physics. 28 (3). 1133-1146. doi:10.4208/cicp.OA-2019-0124
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