explicit/implicit finite volume computational-fluid-dynamics code, the upwind schemes are first tested on a complex double-wedge Enter flow configuration.
Turbulent effects were modeled utilizing Wilcox's k-omega model with two compressibility corrections by Coakley's group, the widely popular Spalart-Allmaras and supersonic transport (SST) models as well as an explicit algebraic Reynolds stress model (EARSM) by Wallin and Johansson. The upwind schemes include Lion and Steffen's advection upstream splitting method (AUSM) flux-vector splitting, its modification by Wada and Lion, called AUSMDV, and Roe's flux-difference splitting.
This configuration is a heated compression ramp model which is presently investigated experimentally in a shock tube to assess the influence of the wall temperature on boundary layer separation behavior.Īn evaluation of three upwind schemes and four turbulence models is presented in order to assess their respective separate and combined performance in complex hypersonic flows with large scale separation. Of recent interest is the accurate prediction of wall heat transfer rates in the second test configuration. This test case is mainly used to demonstrate the present state of a newly implemented advanced multigrid method for supersonic turbulent flows. The first configuration involves a supersonic inlet with interior com- pression and the development of a subsequent shock train. The turbulence model is Wilcox's low Reynolds num- ber k − ω model with some extensions for modeling high-speed wall-bounded flows and separation regions. This paper presents an overview of the ongoing work on the numerical simulation of high-speed inlet flows solving the complete Reynolds averaged Navier-Stokes equation with a block-structured, cell-centered finite-volume method. Within the frame of the German Collaborative Research Center SFB 253 "Funda- mentals of Design of Aerospace Planes", generic supersonic and hypersonic engine inlet configurations are investigated both numerically and experimentally. Therefore we present a mechanism that can be used with any hybrid application without needing a programmer to analyze the application nor modify it. The performance evaluation shows that LeWI, the novel balancing algorithm we are presenting in this paper, together with DLB is able to improve the performance of a different range of unbalanced applications and when applied to well balanced applications it does not introduce significant overhead. It solves the imbalance among processes in applications with two levels of parallelism using the malleability of the inner level. DLB helps parallel programming models to make the most of the computational power available with the minimum effort. We have implemented LeWI within DLB a Dynamic Load Balancing Library developed by us. To achieve this LeWI reassigns the computational resources of blocked processes to other processes more loaded. Our algorithm can balance fine grain imbalances, non iterative applications and applications with irregular imbalance. Your support allows us to continue doing what we love - creating beautiful art.We present LeWI: a novel load balancing algorithm, that can balance applications with very different patterns of imbalance. With every Lantern Press purchase, you are supporting artists and creatives who care deeply about their craft, and a Seattle based company that is proud to print our products in America. Peruse our collection of imagery across multiple mediums, including art prints, metal and wood signs, home goods like mugs, coasters, totes and kitchen towels, to outdoor stickers, playing cards and puzzles. Lantern Press is a dynamic art company that hopes to connect you with your memorable experiences through our unique artwork. Printed in the USA using eco-certified inks.Sticker sizes range due to variations of contour art.Best when applied to a clean and even surface.Intended for permanent placement on water bottles, laptops, coolers, cars and more.Waterproof and UV resistant for outdoor use.
Original contour artwork by Lantern Press, printed as a vinyl sticker decal, designed for the outdoors.