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)...

Galloping is a typical wind-induced phenomenon in iced conductors, which can have serious impacts on the safe and stable operation of power systems. The aerodynamic characteristics an conductor are key factor study galloping, be determined mainly by numerical simulation flow past conductor. Based Reynolds-averaged Navier-Stokes (RANS) equations closed Spalart-Allmaras (S-A) turbulence model, th...

Although several previous studies have reported a potential drag-reducing effect of dimpled surfaces in turbulent boundary layers, there is lack replicability across experiments performed by different research groups. To contribute to the dialogue, we scrutinize one most studied dimple geometries literature, which has diameter 20 mm and depth 0.5 mm. There no general consensus literature on dra...

Over the past years, there has been innovative ideas about data-driven turbulence modeling proposed by scholars all over world. This paper is a continuity of these significant efforts, with aim offering better representation for physics. Previous works mainly focus on viscosity or Reynolds stress, while are few transition. In our work, two mapping functions between average flow parameters and t...

This paper presents the evaluation of Stanford University Unstructured (SU2) open-source computational software package for a high Mach number 5 flow. The test case selected is an impinging shock wave turbulent boundary layer interaction (SWTBLI) on flat plate where experimental data Sch¨ulein et al. [27] used validation purposes. Two turbulence models, Spalart–Allmaras (SA) and k-ω Shear Stres...

This article presents a new turbulence closure based on the k-ω SST model for predicting turbulent flows of Herschel–Bulkley fluids, including Bingham and power-law fluids. The has been calibrated with direct numerical simulations (DNS) data fully-developed pipe flow shear-thinning viscoplastic shows good agreement in mean velocity, average viscosity, shear stress budget friction factor. latter...

One-dimensional unsteady Reynolds-averaged Navier–Stokes computations were performed for oscillatory transitional and turbulent pipe flows the results validated against existing experimental data a wide variety of Reynolds Womersley numbers. An version Johnson–King model was implemented with optional near-wall modification to account temporal pressure gradient variations, predictions compared t...

This study experimentally and numerically investigates the effects of nozzle/needle distance (clearance) supply pressure on single phase compressible gas flow in a micro orifice with needle restriction, which play important roles many engineering applications such as cryogenic cooling MEMS (microelectromechanical systems) device cooling. Nitrogen was used working fluid at pressures ranging from...

The present work studied various models for predicting turbulence in the problem of injecting a fluid microjet into boundary layer turbulent flow. For this purpose, one-equation Spalart–Allmaras (SA), two-equation k–ε and k–ω, multi-equation transition k-kL–ω, shear stress transport (SST), Reynolds were used solving steady layer, their results are compared with experimental results. Comparing i...