Publicado 4 números por año
ISSN Imprimir: 1065-3090
ISSN En Línea: 1940-4336
Indexed in
FLOW PAST STATIONARY AND OSCILLATING AIRFOIL AT A LOW REYNOLDS NUMBER USING SHARP INTERFACE IMMERSED-BOUNDARY APPROACH
SINOPSIS
The present study reports on flow past airfoils (stationary and moving) using a sharp interface immersed-boundary approach. A nonboundary conforming approach like the immersed-boundary method offers a viable alternative over traditional boundary conforming approach by allowing us to model flow past arbitrarily complex shapes, by eliminating the need to regrid the flow domain as the body exhibits motion. We present flow past a NACA 0012 airfoil under stationary conditions as well as exhibiting pitching motion. The evolution of vortex dynamics and wake structures are presented to show that the developed sharp interface immersed-boundary approach captures the flow physics of dynamic stall accurately. Moving body problems involving immersed-boundary approach usually encounter the issues of spurious oscillations and mass conservation. This is handled through a field extension strategy based on a ghost cell approach, which allows for extrapolating the flow field value onto the ghost nodes, ensuring smooth temporal transition as the immersed surface moves through time. The results presented here show excellent agreement with the experimental results found in the literature.
-
Akbari, M.H. and Price, S.J., Simulation of Dynamic Stall for a NACA 0012 Airfoil Using a Vortex Method, J. Fluids Struct., vol. 17, pp. 855-874, 2003.
-
Alam, M.M., Zhou, Y., Yang, H.X., Guo, H., and Mi, J., The Ultra-Low Reynolds Number Airfoil Wake, Exp. Fluids, vol. 48, pp. 81-103, 2010.
-
Arya, N. and De, A., Effect of Grid Sensitivity on the Performance of Wall Adapting SGS Models for LES of Swirling and Separating-Reattaching Flows, Comput. Math. Appl., vol. 78, no. 6, pp. 2035-2051, 2019.
-
Das, P. and De, A., Numerical Investigation of Flow Structures around a Cylindrical Afterbody under Supersonic Condition, Aerosp. Sci. Technol., vol. 47, pp. 195-209, 2015.
-
Das, P. and De, A., Numerical Study of Flow Physics in Supersonic Base-Flow with Mass Bleed, Aerosp. Sci. Technol., vol. 58, pp. 1-17, 2016.
-
De, A. and Acharya, S., Dynamics of Upstream Flame Propagation in a Hydrogen-Enriched Premixed Flame, Int. J. Hydrogen Energy, vol. 37, pp. 17294-17309, 2012.
-
Dutsch, H., Durst, F., Becker, S., and Lienhart, H., Low-Reynolds-Number Flow around an Oscillating Circular Cylinder at Low Keulegan-Carpenter Numbers, J Fluid Mech., vol. 360, pp. 249-271, 1998.
-
Fadlun E.A., Verzicco, R., Orlandi, P., and Mohd-Yusof, J., Combined Immersed-Boundary Finite-Difference Methods for Three-Dimensional Complex Flow Simulations, J. Comput. Phys., vol. 161, pp. 35-60, 2000.
-
Gilmanov, A. and Sotiropoulos, F., A Hybrid Cartesian/Immersed-Boundary Method for Simulating Flows with 3D, Geometrically Complex, Moving Bodies, J. Comput. Phys., vol. 207, pp. 457-492, 2005.
-
Guilmineau, E. and Queutey, P., A Numerical Simulation of Vortex Shedding from an Oscillating Circular Cylinder, J. Fluids Struct., vol. 16, pp. 773-794, 2002.
-
Kim, J., Kim, D., and Choi, H., An Immersed-Boundary Finite-Volume Method for Simulations of Flow in Complex Geometries, J. Comput Phys., vol. 171, pp. 132-150, 2001.
-
Kumar, M. and Roy, S., A Sharp Interface Immersed-Boundary Method for Moving Geometries with Mass Conservation and Smooth Pressure Variation, Comput. Fluids, vol. 137, pp. 15-35, 2016.
-
Kumar, S.P., De, A., and Das, D., Investigation of Flow Field of Clap and Fling Motion Using Immersed-Boundary Coupled Lattice Boltzmann Method, J. Fluids Struct., vol. 57, pp. 247-263, 2015.
-
Mittal, R., Dong, H., Bozkurttas, M., Najjar, F.M., Vargas, A., and von Loebbecke, A., A Versatile Sharp Interface Immersed-Boundary Method for Incompressible Flows with Complex Boundaries, J. Comput. Phys, vol. 227, pp. 4825-4852, 2008.
-
Ohmi, K., Coutanceau, M., Daube, O., and Loc, T.P., Further Experiments on Vortex Formation around an Oscillating and Translating Airfoil at Large Incidences, J. Fluid Mech., vol. 225, pp. 607-630, 1991.
-
Peskin, C.S., The Immersed-Boundary Method, Acta Numer., vol. 11, pp. 479-517, 2002.
-
Seo, J.H. and Mittal, R., A Sharp-Interface Immersed-Boundary Method with Improved Mass Conservation and Reduced Spurious Pressure Oscillations, J. Comput. Phys., vol. 230, pp. 7347-7363, 2011.
-
Seshadri, P.K. and De, A., Assessment of Pressure Reconstruction Schemes in Sharp Interface Immersed-Boundary Method, AIP Conf. Proc., 2018.
-
Udaykumar, H.S., Mittal, R., Rampunggoon, P., and Khanna, A., A Sharp Interface Cartesian Grid Method for Simulating Flows with Complex Moving Boundaries, J. Comput. Phys., vol. 174, pp. 345-380, 2001.
-
Yang, J. and Balaras, E., An Embedded-Boundary Formulation for Large-Eddy Simulation of Turbulent Flows Interacting with Moving Boundaries, J. Comput. Phys., vol. 215, pp. 12-40, 2006.
-
Seshadri Pradeep Kumar, De Ashoke, A novel sharp interface immersed boundary framework for viscous flow simulations at arbitrary Mach number involving complex and moving boundaries, Computers & Fluids, 206, 2020. Crossref
-
Seshadri Pradeep Kumar, De Ashoke, Investigation of shock wave interactions involving stationary and moving wedges, Physics of Fluids, 32, 9, 2020. Crossref