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Showing 1 to 13 of 13 for “"muscl"”.
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Two-dimensional Euler computations on a triangular mesh using an upwind, finite-volume scheme
… Higher order accuracy is achieved by using MUSCL-differencing. MUSCL-differencing is implemented on an unstructured grid by interpolating the values stored at the vertices of triangular elements to find the value at the outermost point of the three-point MUSCL-differencing formula. Flow …
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Development of a Higher-Order Navier-Stokes Solver for Transient Compressible Flows
… Upstream Centered Scheme for Conservation Laws (MUSCL) approach. The code development was done using Matlab. The code was verified using two validation cases. Firstly, subsonic, transonic, and supersonic flows over the 2‐D bump were simulated, and the results of the code were compared to the …
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Numerical Analysis of Gun Barrel Pressure Blast Using Dynamic Mesh Adaption
… Upstream centered Scheme for Conservation Laws (MUSCL) approach. The computed results reasonably capture the major flow features such as shock waves, blast waves, vortical flows, etc. which are generated in launching a projectile up to supersonic speed. The projectile mass and the initial …
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A Volume of Fluid (VoF) based all-mach HLLC Solver for Multi-Phase Compressible Flow with Surface-Tension
… Upstream-centred Scheme for Conservation Laws (MUSCL) [2] is applied to non-conservative (primitive) variables, which yields both robustness and accuracy. Liquid-gas interface curvature is computed via both height functions [3, 4] and the convolution method [5]. This is in the interest of …
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The numerical study of 3-dimensional laminar hypersonic blunt-fin interactions
… second order accuracy is achieved through the MUSCL approach. The viscous contribution is modeled by a centered difference scheme. An iterative matrix solver is used to advance the implicit solution in time. To handle large three-dimensional grids, the code is implicit and run on a parallel …
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Towards Improvement of Numerical Accuracy for Unstructured Grid Flow Solver
… flux is then calculated using the concept of MUSCL (Monotone Upstream-centered Schemes for Conservation Laws) approach. In order to maintain the accuracy for the finite volume scheme, an innovative method based on Radial Basis Function interpolation is introduced as a substitution to Gaussian …
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Numerical simulation of two and three-dimensional viscous free surface flows in partially-filled containers using a surface capturing approach
… velocity field. A slope-limited, high order MUSCL scheme is adopted for approximating the inviscid flux terms, while the viscous fluxes are centrally differenced. Two different methods are considered for solving the resulting block-banded system of equations;The capabilities of the surface …
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One-dimensional positive displacement pump description in cavitating conditions
… a Monotonic Upwind Scheme forConservational Law (MUSCL). This algorithm is second-order accurate intime and space, with a total variation diminishing (TVD) scheme to preventspurious oscillation. In order to introduce a dissipation due to friction at thewall in a quasi-steady formulation, a source …
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Modeling the Hydrodynamics of a Fluidized Bed
… that the fluidized bed can be modeled using MUSCL discretization and the Ahmadi turbulence model. Three-dimensional sand fluidized beds were simulated for different fluidization regimes. Fluidized beds for all the regimes behaved as second-order dynamic systems. Bubbling fluidized beds showed …
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Two-phase modelling of debris flow over composite topography: theoretical and numerical aspects
… time, and this has been achieved by means of the MUSCL approach. Finally numerical schemes have been parallelized using OpenMP standard. All the models are then tested comparing analytical and numerical solutions. The results are satisfactory, with an accurate agreement between the two solutions …
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Managing complexity in high-concentration flow modelling aimed at hazard assessment: numerical and practical aspects
… meshes. To reach second order accuracy, a MUSCL-Hancock approach is considered, with gradient computation performed by means of the multidimensional method proposed in Barth and Jespersen (1989) for Euler equations. The effects of different gradient limiters are also evaluated, aiming at a …
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NUMERICAL METHODS FOR MULTIPHASE FLOWS: FROM A SIMPLIFIED INCOMPRESSIBLE BAER-NUNZIATO MODEL TO A UNIFIED THEORY OF COMPRESSIBLE MULTIPHASE FLUID AND SOLID MECHANICS
… part of the PDE system is discretized with a MUSCL-Hancock finite volume scheme using a primitive variable reconstruction and positivity preserving limiting, combined with a path-conservative technique to deal with the non-conservative products. Furthermore, the scheme employs semi-analytical …
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Computational Fluid Dynamics with Embedded Cut Cells on Graphics Hardware
The advent of general purpose computing on graphics cards has led to significant software speedup in many fields. Designing code for GPUs, however, requires careful consideration of the underlying hardware. This thesis explores the implementation of fluid dynamics simulations featuring embedded cut …