In this paper, an adaptive mesh refinement technique is presented for simulation of compressible flows, which can effectively refine the in regions with shock waves and vortices. The present approach uses total energy per unit volume as indicator to capture vortical structures. approach, h-refinement strategy adopted. To save computational effort, flow variables on new are obtained from previou...

The effect of a wind gust on the aerodynamic characteristics of a rigid wing undergoing insect-based flapping motion is studied numerically. The turbulent flow near the flapping wing is described by the 3-D unsteady compressible Reynolds-Averaged Navier-Stokes equations with the Spalart-Allmaras turbulence model. The governing equations are solved using a second-order node-centered finite volum...

Abstract. A new method for high-fidelity aeroelastic static analysis of composite laminated wings is proposed. The structural and the fluid-dynamic are coupled in a heterogeneous staggered process. Finite Element Method (FEM), Carrera Unified Formulation (CUF) Equivalent Plate Modelling (EPM) combined to model complex three-dimensional geometries bi-dimensional framework; Computational Fluid Dy...

For the analysis of low-speed incompressible fluid dynamics with turbulence around airfoils, we developed a finite element formulation based on stabilized pressure and velocity formulation. To shape optimization bidimensional this is applied using machine learning (TensorFlow) public domain global algorithms. The goal to maximize lift-over-drag ratio by class-shape function transformation (CST)...

In recent years, machine learning methods represented by deep neural networks (DNNs) have been a new paradigm of turbulence modeling. However, in the scenario high Reynolds numbers, there are still some bottlenecks, including lack high-fidelity data and stability problem coupling process models Reynolds-averaged Navier–Stokes (RANS) solvers. this paper, we propose an improved ensemble Kalman in...

The concept of a vertical-axis spiral wind rotor is proposed and implemented in the interest of adapting it to air flows from all directions and improving the rotor’s performance. A comparative study is performed between the proposed rotor and conventional Savonius rotor. Turbulent flow features near the rotor blades are simulated with Spalart-Allmaras turbulence model. The torque coefficient o...

The nonstationary separated incompressible flows around Darrieus and Savonius rotors of vertical-axis wind turbines were investigated through computational simulation using the Reynolds averaged Navier–Stokes equations Spalart–Allmaras turbulence model. implicit finite-volume algorithm, basis which was artificial compressibility method, chosen to obtain numerical solution. series physical exper...