Plasma flow control of the tip vortices over a very low aspect-ratio wing (2022)
Journal Article
Dong, L., Choi, K. S., & Wang, Y. (2022). Plasma flow control of the tip vortices over a very low aspect-ratio wing. Physics of Fluids, 34(8), Article 087101. https://doi.org/10.1063/5.0101110

Flow control of the tip vortices over a very low aspect-ratio wing was carried out using the dielectric-barrier-discharge plasma actuators. The results indicate a large change in the aerodynamic forces by plasma flow control, where the lift coefficie... Read More about Plasma flow control of the tip vortices over a very low aspect-ratio wing.

Development and interaction of vortices over a very low aspect-ratio wing under pitch-up motion (2022)
Journal Article
Dong, L., Choi, K., Mao, X., & Wang, Y. (2022). Development and interaction of vortices over a very low aspect-ratio wing under pitch-up motion. Journal of Fluid Mechanics, 943, Article A42. https://doi.org/10.1017/jfm.2022.451

The vortical structures over a thin rectangular wing with a very low aspect ratio of 0.277 were investigated in a wind tunnel at an effective Reynolds number of 3×106. When applying pitch-up motion pivoted at mid-chord, the maximum lift angle was inc... Read More about Development and interaction of vortices over a very low aspect-ratio wing under pitch-up motion.

Opposition control of turbulent spots (2022)
Journal Article
Wang, Y. X., Choi, K. S., Gaster, M., Atkin, C., Borodulin, V., & Kachanov, Y. (2022). Opposition control of turbulent spots. Journal of Fluid Mechanics, 943, Article A3. https://doi.org/10.1017/jfm.2022.396

Opposition control of artificially initiated turbulent spots in a laminar boundary layer was carried out in a low-turbulence wind tunnel with the aim to delay transition to turbulence by modifying the turbulent structure within the turbulent spots. T... Read More about Opposition control of turbulent spots.

Hydrophobically/oleophilically guarded powder metallurgical structures and liquid impregnation for ice mitigation (2022)
Journal Article
Yang, D., Bao, R., Choi, K. S., Clare, A. T., & Hou, X. (2022). Hydrophobically/oleophilically guarded powder metallurgical structures and liquid impregnation for ice mitigation. Chemical Engineering Journal, 446, Article 137115. https://doi.org/10.1016/j.cej.2022.137115

Icing hazards often pose operational and safety challenges. Various surface and coating approaches have been attempted for ice mitigation purposes, but the durability remains an outstanding issue. Inspired by traditional powder metallurgy and slipper... Read More about Hydrophobically/oleophilically guarded powder metallurgical structures and liquid impregnation for ice mitigation.

A phase-field method for three-phase flows with icing (2022)
Journal Article
Zhang, W., Shahmardi, A., Choi, K., Tammisola, O., Brandt, L., & Mao, X. (2022). A phase-field method for three-phase flows with icing. Journal of Computational Physics, 458, Article 111104. https://doi.org/10.1016/j.jcp.2022.111104

A numerical scheme to simulate three-phase fluid flows with phase change is proposed. By combining the Cahn-Hilliard model for water-air interface, Allen-Cahn equation for ice and fluid and Navier-Stokes equation for momentum, we solve the evolution... Read More about A phase-field method for three-phase flows with icing.

Aerodynamic and aeroacoustic optimization of leading-edge undulation of a naca 65(12)-10 airfoil (2021)
Journal Article
Kim, J. H., Choi, K. S., Lacagnina, G., Paruchuri, C., Joseph, P., Hasheminejad, S. M., …Pinelli, A. (2021). Aerodynamic and aeroacoustic optimization of leading-edge undulation of a naca 65(12)-10 airfoil. AIAA Journal, 60(4), 2342-2353. https://doi.org/10.2514/1.J060716

Experimental studies of a NACA 65(12)-10 airfoil with a sinusoidal leading-edge undulation (LEU) were carried out to simultaneously optimize its aerodynamic and aeroacoustic performances by considering the attached as well as the separated flow at th... Read More about Aerodynamic and aeroacoustic optimization of leading-edge undulation of a naca 65(12)-10 airfoil.

Bypass transition in a boundary layer flow induced by plasma actuators (2021)
Journal Article
Xiao, D., Borradaile, H., Choi, K. S., Feng, L., Wang, J., & Mao, X. (2021). Bypass transition in a boundary layer flow induced by plasma actuators. Journal of Fluid Mechanics, 929, 134-150. https://doi.org/10.1017/jfm.2021.835

Bypass transition in flow over a flat plate triggered by a pair of dielectric-barrier-discharge plasma actuators mounted on the plate surface and aligned in the streamwise direction is investigated. A four-species plasma-fluid model is used to model... Read More about Bypass transition in a boundary layer flow induced by plasma actuators.

Toward Exceptional Icephobicity with Chionophile-Inspired Durable Biomimetic Coatings (2021)
Journal Article
Memon, H., De Focatiis, D. S. A., Choi, K. S., & Hou, X. (2021). Toward Exceptional Icephobicity with Chionophile-Inspired Durable Biomimetic Coatings. ACS Applied Polymer Materials, 3(8), 4184-4194. https://doi.org/10.1021/acsapm.1c00623

Liquid-infused polymeric surfaces have demonstrated promising icephobicity. However, the capability to maintain the icephobic performance after material damage has been a challenge, both in terms of conserving a smoother surface and the replenishment... Read More about Toward Exceptional Icephobicity with Chionophile-Inspired Durable Biomimetic Coatings.

Molecular dynamics simulation of liquid argon flow in a nanoscale channel (2021)
Journal Article
Sun, Q., Zhao, Y., Choi, K., & Mao, X. (2021). Molecular dynamics simulation of liquid argon flow in a nanoscale channel. International Journal of Thermal Sciences, 170, Article 107166. https://doi.org/10.1016/j.ijthermalsci.2021.107166

The convective heat transfer in the Micro/ Nanoscale channel is of significant importance in engineering applications, and the classical macroscopic theory is invalid at depicting its physical processes and mechanisms. In this study, molecular dynami... Read More about Molecular dynamics simulation of liquid argon flow in a nanoscale channel.

Reduction of atomistic ice tensile stress by graphene–carbon nanotube coating (2021)
Journal Article
Sun, Q., Zhao, Y., Choi, K., Hou, X., & Mao, X. (2021). Reduction of atomistic ice tensile stress by graphene–carbon nanotube coating. Applied Surface Science, 565, Article 150562. https://doi.org/10.1016/j.apsusc.2021.150562

The accumulation of ice has adverse effects on human activities on the ground and in the air while the dynamic mechanism of the interaction force between the ice and wall surface has not been fully explored. Herein, molecular dynamics (MD) simulation... Read More about Reduction of atomistic ice tensile stress by graphene–carbon nanotube coating.