Large-Eddy Simulations with an Immersed Boundary Method: Pollutant Dispersion over Urban Terrain

Combined Immersed Boundary/Spectral Method for Large Eddy Simulation of Atmospheric Flows over Topography

Accurate modeling of atmospheric flows over topography plays an important role in the prediction of local weather in mountain areas and snow avalanche due to wind-induced snow redistribution. Large eddy simulation (LES) is a numerical technique in which only the large eddies of the turbulent motions are calculated and the net effect of the small eddies is modeled by a subgrid scale (SGS) model,...

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...

An immersed boundary method for numerical simulations of boundary layers with roughness

Large-eddy Simulations of the Effects of Hilly Terrain on the Convective Boundary Layer

Large-eddy simulations of the convective boundary layer are compared over hilly versus flat surfaces. Moderate values for the height and horizontal spacing of the hills were selected. Thermallydirect hill-valley circulations are induced by the uneven terrain, accounting for a significant fraction of the resolved energy in the boundary-layer eddies. The probability of upward eddy motion reaches ...

Modelling of the Dynamics of an immersed body in a microchannel with stenosis using the immersed boundary method

In the present study, the combination of lattice Boltzmann and immersed boundary methods is used to simulate the motion and deformation of a flexible body. Deformation of the body is studied in microchannel with stenosis and the effect of the flexibility changes on its deformation is investigated. The obtained results in the present manuscript show that by increasing the elasticity modulus, the...