We investigated the flow of gravity currents past circular cylinders above the smooth bed. In order to simulate the gravity current interacting with cylinder, large eddy simulation (LES) coupled with a direct forcing/fictitious domain (DF/FD) method was employed. The hydrodynamic forces induced by the gravity current on a circular cylinder and the flow features were investigated according to a gap distance from location below the cylinder to the bed and Reynolds number. When the gravity current encounters the circular cylinder, the maximum drag force occurs regardless of gap distance. In addition, Von Karman vortex shedding emerges behind the circular cylinder for larger gap distance. In this regard, the results can be divided into impact, transient and quasi-steady stages based on the characteristics of the hydrodynamic forces varying with time, which is consistent with previous observations. Consequently, our numerical approach well simulated the flow of gravity currents past circular cylinders in good agreement with those of previous studies.
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ASME/JSME/KSME 2015 Joint Fluids Engineering Conference
July 26–31, 2015
Seoul, South Korea
Conference Sponsors:
- Fluids Engineering Division
ISBN:
978-0-7918-5732-8
PROCEEDINGS PAPER
Large Eddy Simulation of Gravity Current Flow Past a Circular Cylinder Using Immersed Boundary Method
Jae Hwan Wang,
Jae Hwan Wang
Pusan National University, Pusan, Korea
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Hyun Sik Yoon
Hyun Sik Yoon
Pusan National University, Pusan, Korea
Search for other works by this author on:
Jae Hwan Wang
Pusan National University, Pusan, Korea
Hyun Sik Yoon
Pusan National University, Pusan, Korea
Paper No:
AJKFluids2015-07325, V01AT07A001; 6 pages
Published Online:
April 4, 2016
Citation
Wang, JH, & Yoon, HS. "Large Eddy Simulation of Gravity Current Flow Past a Circular Cylinder Using Immersed Boundary Method." Proceedings of the ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. Volume 1A: Symposia, Part 2. Seoul, South Korea. July 26–31, 2015. V01AT07A001. ASME. https://doi.org/10.1115/AJKFluids2015-07325
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