A hybrid discontinuous spectral element method and filtered mass density function solver for turbulent reacting flows. (2nd July 2020)

• Record Type: Journal Article
• Authors: Komperda, Jonathan; Ghiasi, Zia; Li, Dongru; Peyvan, Ahmad; Jaberi, Farhad; Mashayek, Farzad
• Is Part Of: Numerical heat transfer. Volume 78:Number 1(2020)
• Page Start: 1
• Page End: 29
• Publication Date: 2020-07-02
• Subjects: Heat -- Transmission -- Measurement -- Periodicals; Mass transfer -- Measurement -- Periodicals; Numerical analysis -- Periodicals; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; 621.4022
• DOI: 10.1080/10407790.2020.1746608
• Languages: English
• ISSNs: 1040-7790

Abstract

Abstract: We present a novel hybrid scheme for the large eddy simulation (LES) of turbulent reacting flows. The scheme couples the discontinuous spectral element method (DSEM) solver for the unsteady compressible Navier-Stokes equations with a Monte Carlo particle filtered mass density function (FMDF) solver for the transport of reacting species. The method is capable of high-order simulations on unstructured grids. Mean particle estimate construction mimics the DSEM numerical procedure and utilizes variable basis functions. The scheme is tested on non-reacting and reacting Taylor-Green vortex flows. Studies of varying polynomial order, different basis functions for constructing particle estimates, and varying particle quantities are conducted. We demonstrate that a tent kernel, in conjunction with high polynomial order, produces the most accurate results. The chemically reacting simulations validate the hybrid scheme and demonstrate its applicability across a range of reaction regimes. The hybrid scheme's computational cost is 2.1 times the DSEM-LES solver.