Investigation on flow around and through a hygroscopic porous cylinder with consideration of compressibility of moist air

• Main Authors: Junjun Sun, Qingyong Zhu
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2021-09-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/5.0063012

In order to better understand the influence of the physical conditions, such as high temperature, high humidity, and high speed, on porous media in coastal engineering, a compressible, viscous, unsteady flow around and through a hygroscopic porous circular cylinder was discussed in this paper. The effects of the hygroscopicity, the Mach number, and the Darcy number on the flow structure, temperature field, and water content of the porous cylinder are evaluated in detail. The results of numerical simulations show significant effects of compressibility of moist air on the lift and drag of the cylinder. With an increase in the Mach number, the frequency of vortex shedding argument and dimensionless lift and drag of the porous cylindrical surface decrease. Nevertheless, the effect of the Mach number on the magnitude of the vorticity and distribution of temperature is negligible. In our simulation, we also found that an increase in the Darcy number significantly weakens the magnitude of the vorticity and the amplitude of lift and drag of the cylinder. Moreover, the absorption of the porous cylinder may also have a weak effect on accelerating vortex shedding. Considering the high temperature, high humidity, and high speed of the coastal environment, this paper has some significance for the study of wind erosion.