Neural-network-based mixed subgrid-scale model for turbulent flow

A Discrete Dynamical System Subgrid-Scale Model of Turbulent Convection

On Implicit Subgrid Scale Modeling for Turbulent Flows

Large Eddy Simulation (LES) is an effective intermediate approach between DNS and RANS, capable of simulating flow features which cannot be handled with RANS such as significant flow unsteadiness and strong vortex-acoustic couplings, and providing higher accuracy than RANS at reasonable cost but still typically an order of magnitude more expensive. Desirable modeling choices involve selecting a...

A Variational Multiscale Method with Multifractal Subgrid-scale Modeling for Large-eddy Simulation of Turbulent Flow

A variational multiscale method with multifractal subgrid-scale modeling is proposed for large-eddy simulation of turbulent flow. In the multifractal subgrid-scale modeling approach, the subgrid-scale velocity is evaluated from a multifractal description of the subgrid-scale vorticity, which is based on the multifractal scale similarity of gradient fields in turbulent flow. The multifractal sub...

For Submission to Physics of Fluids a Recommended Modiication to the Dynamic Two-parameter Mixed Subgrid Scale Model for Large Eddy Simulation of Turbulent Flow

It is well known that the correlation between the Smagorinsky model and the subgrid scale stress is low, while the model based on the scale similarity assumption has considerably higher correlation. However, the scale similarity model by itself does not work well in a shear ow simulation because it seems passive on the mean velocity. Therefore the model is usually used together with the Smagori...

Neural network based vehicle-following model for mixed traffic conditions

Car-following behaviour is well studied and analyzed in the last fifty years for homogeneous traffic. However in the mixed traffic, following behaviour is found to vary based on type of lead and following vehicles. In this study, a neural network based model is proposed to predict the following behaviour for different lead and following vehicle-type combinations. Performance of the model is stu...