On Robust and Accurate Arbitrary Polytope CFD Solvers

Feature‐based adaptive mesh refinement for wingtip vortices

“…Flow simulations were performed using the Loci/CHEM flow solver [10][11][12], which was originally developed for simulating non-equilibrium, chemically reacting flow but can also be used to simulate non-reacting flow. Loci/CHEM is an application built using the Loci framework [55] that provides the infrastructure for facilitating intra-application coordination of fine-grained numerical kernals and methods.…”

“…The cell on the right now has nine faces. Although this refinement strategy can be employed with the Loci/CHEM flow solver [10][11][12], it cannot be employed with all flow solvers. It should be noted that our feature-based approach is not limited to use with the refinement strategy described here and can be used in conjunction with conventional approaches.…”

“…Once the nodes are marked, the strategy described in Chalasani et al [9] is employed to refine the mesh in the specified regions. The flow solver we use is the Loci/CHEM code [10][11][12]. We demonstrate the efficacy of our approach by applying it to the prediction of the flow fields around two different configurations, a wing in a wind tunnel at 10 • angle of attack [13] and a missile configuration [14] at 0 • angle of attack with canards deflected 15 • spinning at 30 and 60 Hz.…”

Verification of RANS Turbulence Models in Loci-CHEM using the Method of Manufactured Solutions

“…This approach effectively neglects a term in the normal gradient which can lead to stencils with negative weights (which affect the code's stability). Luke 23 has modified the normal gradient calculation such that a limiter is applied to the offending term that both maintains second-order accuracy in smooth regions of the flow and ensures a positive stencil. See Reference 23 for more details.…”

Thermal Protection System Cavity Heating for Simplified and Actual Geometries using Computational Fluid Dynamics Simulations with Unstructured Grids

“…For the current task Loci-CHEM 6 (hereby referred to as CHEM) was used to solve the patch grid and the flow conditions on the outer boundary were fixed by the DPLR CFD Smooth OML solutions. CHEM is finite volume based flow solver developed using the Loci 6 framework, both of which have been developed by Dr. Ed Luke at Mississippi State University (MSU).…”