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Showing 1 to 20 of 38 for “"Navier-Stokes solver"”.
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Laser engine simulation using pressure based navier-stokes solver
… Based on this procedure, a Pressure Based Navier-Stokes Solver (PBNS) is developed using a generalized curvilinear coordinate system. The solver is first tested in application to a subsonic compressible flow over an insulated flat plate and to a flow in an axisymmetric converging-diverging …
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Development of a Higher-Order Navier-Stokes Solver for Transient Compressible Flows
<p>A higher‐order density based Navier‐Stokes solver was developed for 2‐Dimensional flows using the finite volume approach. The Van leer flux‐splitting technique was used to calculate the fluxes. The second‐order spatial accuracy was achieved using the variable extrapolation method developed by …
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An adaptive high order Reynolds-averaged Navier-Stokes solver with transition prediction
… state of the art discretization in industrial solvers remains nominally second order accurate, which makes them unfeasible to resolve multi-scale phenomena such as turbulence or acoustics, and limits their efficiency in terms of the error per degree of freedom. In recent years, the CFD …
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The development of reynolds averaged navier stokes solver for a two dimensional compressible flow problem
… initial form of governing equation called the Navier-Stokes equations; the flow can be simplified as the Laplace equation. When the incompressible condition cannot be maintained, the compressibility effects have to be taken into account due to the increasing incoming velocity, while the …
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Development and application of a dispersed two-phase flow capability in a general multi-block Navier Stokes solver
… in a generalized coordinate multi-block Navier-Stokes solver in a distributed parallel framework. The developed algorithm was validated by comparing the computed particle statistics for 28 microns lycopodium, 50 microns glass, and 70 microns copper with available data [2] for a turbulent …
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A semi-implicit Navier-Stokes solver and its application to a study of separated flow about blunt delta wings
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1989.
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Viscous solutions for the Navier Stokes equations using an upwind finite volume technique
… finite volume, two-dimensional, thin layer Navier Stokes solver to achieve complete Navier Stokes solutions is described. The shear stress and heat flux contributions are identified and transformed to a generalized coordinate system. The metrics which result from the transformation have a …
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A numerical study of hypersonic flows using the full Navier-Stokes equations with different air models
A two-dimensional, axisymmetric, full Navier-Stokes solver has been developed with equilibrium and nonequilibrium air models. The effects of a real gas are investigated numerically in the hypersonic flow regime.
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Numerical Modeling of Lifting Flows in the Presence of a Free Surface
… of computers and the latest developments in Navier-Stokes solvers, such as the Ranse methods; potential flow theory offers the possibility to create or use existing computational tools, which allow us modeling hydrodynamics problems in a simpler manner. Navier-Stokes solver can be very …
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Numerical simulation of fluid flow through porous media using the immersed boundary method
… method coupled with a finite difference based Navier-Stokes solver has been developed. The flow solver is used to analyze the two-dimensional, unsteady and viscous flow at low Reynolds numbers through packings of ordered or disordered arrays of mono-, bi- and polydisperse cylinders and …
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Direct computations of marangoni driven flows using a volume of fluid method
… surface tension coefficient into a VoF based Navier-Stokes solver is developed. This new numerical model provides a robust and accurate method for computing the surface gradients directly by finding the tangent directions on the interface using height functions. The implementation applies to …
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Large eddy simulations of turbulent flows on graphics processing units: application to film-cooling flows
… of GPUs for CFD simulations, an incompressible Navier-Stokes solver was developed for a GPU. This solver is capable of simulating unsteady laminar flows or performing a LES or DNS of turbulent flows. The Navier-Stokes equations are solved via a fractional-step method and are spatially …
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Computational analysis of multielement airfoils for wind turbines
… were performed with ANSYS FLUENT, a hybrid grid Navier-Stokes solver. Computational results were obtained using the four-equation Langtry-Menter Shear Stress Transport (SST) Transition turbulence model. Lift and drag coefficients were computed in an attempt to understand the effect of gap, …
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Validation of CFD Simulations for Hypersonic Flow Over a Yawed Cone
… The unsteady Reynolds-Averaged compressible Navier-Stokes solver with Spalart-Allmaras (SA) turbulence model is employed. The upstream flow Mach number is M = 8 and Reynolds number is Reꝏ = 4.2 x10<sup>5</sup> based on cone generator length. The maximum variation in static pressure …
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Closed-loop control of vortex shedding by means of Lorentz force
… Numerical simulations based on a two-dimensional Navier-Stokes solver show that vortex shedding is indeed suppressed at the Reynolds number values Re = 100 and 200.
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Computational study of hub corner stall in an axial compressor rotor
… was studied computationally using a 3-D Navier-Stokes solver, the Moore Elliptic Flow Program. A one equation, q-L, transitional turbulence model was used with MEFP for closure of the transport equations. The calculation was used to study the physics and flow mechanisms affecting hub …
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3-D flow and performance of a rocket pump inducer at design and off-design flow rates
… inducer was studied computationally using a 3-D Navier-Stokes solver, The Moore Elliptic Flow Program. Design and off-design flow rates were simulated to qualitatively and quantitatively study the effects of flow rate on the flow and performance. Several views of the results were created to aid …
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Investigation of suction recirculation in rocket pump inducers
Rocket pump inducers are studied with a Navier-Stokes solver, the Moore Elliptic Flow Program, MEFP. Two redesigns of the Rocketdyne ADP inducer are performed. The first redesign changes the hub-tip ratio from 0.3 to 0.4. The second redesign influences the leading edge tip region. This part of the …
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Assessment strategies for mixing in very viscous gas-liquid two-phase flows
… phase and.;ii) Using an in house LES based Navier-Stokes solver with the Eulerian-Lagrangian method which uses the Particle-in-Ball approach for the Lagrangian particle tracking of the discrete phase (bubbles).;The efficacy of these methods in predicting the plume oscillation period (POP) …
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Flutter and Forced Response of Turbomachinery with Frequency Mistuning and Aerodynamic Asymmetry
… for modern fans using a 3D time-linearized Navier-Stokes solver. Steady and unsteady flow parameters including local work on the blade surfaces are investigated. It was found that global local work monotonically became more unstable on the pressure side due to the flow rollback effect. The …
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