Synthetic Inflow Condition for Large Eddy
نویسندگان
چکیده
Today, whereas aeronautical CFD applications are mainly based on Reynolds Average Navier-Stokes modeling, Large Eddy Simulation (L.E.S.) is becoming more used for some of them. LES needs the instantaneous inlet velocity as turbulent inflow boundary conditions which motivates the implementation and validation of a synthetic turbulent inflow condition for LES. The so called "Synthetic Eddy Method" (SEM), which is a stochastic algorithm that generates instantaneous velocity, has been studied and validated in homogeneous isotropic turbulence (HIT).A parametric study was conducted in order to extend the SEM to channel flow and comparisons with other boundary conditions such as the periodic LES were carried out.
منابع مشابه
Large-eddy simulation of turbulent flow over an array of wall-mounted cubes submerged in an emulated atmospheric boundary-layer
Turbulent flow over an array of wall-mounted cubic obstacles has been numerically investigated using large-eddy simulation. The simulations have been performed using high-performance computations with local cluster systems. The array of cubes are fully submerged in a simulated deep rough-wall atmospheric boundary-layer with high turbulence intensity characteristics of environmental turbulent fl...
متن کاملتحلیل روشهای مختلف تولید آشفتگی ورودی در رهیافت شبیهسازی گردابههای بزرگ برای پیشبینی پراکندگی آلایندهها در اطراف ساختمانهای مدل
The purpose of the present study is to investigate and analyze numerically, the effective mechanisms on the flow field and pollutant dispersion around a simple and long street canyon by means of Large Eddy Simulation (LES) approach using various inflow turbulence generation methods. For this purpose, four methods i.e. vortex, mapping, synthetic and no-inlet perturbation methods are used as infl...
متن کاملInflow conditions for the large eddy simulation of turbulent boundary layers: A dynamic recycling procedure
The simulation of turbulent boundary layers requires quite detailed inflow information since the resolved flow is unsteady and three-dimensional. Rather than simulating laminar and transitional regions arising near a leading edge, it is often more computationally efficient to formulate a fully turbulent inflow condition. To date, three types of methods for creating appropriate inflow conditions...
متن کاملModelling of Effect of Inflow Turbulence on Large Eddy Simulation of Bluff Body Flows
A random flow generation (RFG) algorithm for a previously established large eddy simulation (LES) code is successfully incorporated into a finite element fluid flow solver to generate the required inflow/initial turbulence boundary conditions for the LES computations of viscous incompressible turbulent flow over a nominally twodimensional circular cylinder at Reynolds number of 140,000. The eff...
متن کاملEstimation of salinity, heat and buoyancy budgets of the inflow coastal current into the Persian Gulf from the Strait of Hormuz
An analytical model for a coastal boundary current was used to investigate heat and salt budget of exchange flows in the Persian Gulf as a marginal sea. Coastal boundary currents exchange heat and freshwater with the mosphere and the offshore waters. As heat and salinity fluxes caused by air-sea interaction and eddy activities, different temperature and salinity associated with boundary current...
متن کامل