Mar 2024
Abstract
The simulation of fluid flow problems, specifically incompressible flows governed by the Navier-Stokes equations (NSE), holds fundamental significance in a range of scientific and engineering applications. Traditional numerical methods employed for solving these equations on $three{\text -}dimensional$ (3D) meshes are commonly known for their moderate conservation properties, high computational intensity and substantial resource demands. Relying on its ability to capture the intrinsic geometric and topological properties of simplicial meshes, discrete exterior calculus (DEC) provides a discrete analog to differential forms and enables the discretization of partial differential equations (PDEs) on meshes. We present a hybrid discretization approach for the 3D incompressible Navier-Stokes equations based on DEC and Fourier transform (FT). An existing conservative primitive variable DEC discretization of incompressible Navier–Stokes equations over surface simplicial meshes developed by (Jagad et al., 2021} is considered in the planar dimension while the Fourier expansion is applied in the third dimension. The test cases of three-dimensional lid-driven cavity and viscous Taylor-Green three-dimensional vortex (TGV) flows show that the simulation results using this hybrid approach are comparable to literature.
Bio
Current Ph.D. candidate in Mechanical Engineering under the supervision of Prof. Peter Schmid and formerly by Prof. Ravi Samtaney. Abdullah obtained his B.Sc. in Aeronautical Engineering from King Abdulaziz University and M.Sc. from Imperial College London. He is also a research associate at the Center of Excellence for Aeronautics and Astronautics (CEAA) at King Abdulaziz City for Science and Technology (KACST),Riyadh, KSA. His research focuses on solving three-dimensional incompressible Navier-Stokes equations by a hybrid discrete exterior calculus and Fourier transform method.
