This study employs a high-fidelity numerical approach to simulate fluid–structure interaction phenomena for the dynamic response of flexible hyperelastic morphing wing structures under low aerodynamic loads. The computations are performed using open-source solids4Foam toolbox, employing partitioned two-way with finite volume solver both fluid and solid. considered is divided into rigid segment, segment featuring 60% chord length being made rubber-like material. concept damping incorporated...

Abstract In this study, the generation of airfoil trailing edge broadband noise that arises from interaction turbulent boundary layer with is investigated. The primary objectives work are: (i) to apply a wall-modelled large-eddy simulation (WMLES) approach predict flow air passing controlled-diffusion blade, and (ii) study blade generated lifting surface edge. This carried out for two values Mach number, $${{\rm Ma}}_{\infty } = 0.3$$ <mml:math...

Slurry pipelines are extensively employed in most mining operations to transport raw materials and tailings. The aim of the paper is twofold: on one hand, develop a generalized slurry flow model using computational fluid dynamics (CFD) better insight into complexity pipe flows, other surrogate for pressure drop predictions, which can be used simulation monitoring tools. A two-fluid based Eulerian-Eulerian approach along with SST k-ω turbulence was used. motion solid phase modeled by kinetic...

Slurry transportation via pipelines has garnered growing attention across various industries worldwide, thanks to its efficiency and environmental friendliness. It emerged as a vital tool for conveying significant volumes of raw phosphate material from extraction points industrial plants, where it is processed into fertilizers. Yet, optimal secure pipeline operations necessitate the careful calibration several physical parameters their interplay minimize energy losses. A thorough exploration...

The decomposition of the local motion a fluid into straining, shearing, and rigid-body rotation is examined in this work for compressible isotropic turbulence by means direct numerical simulations. triple closely associated with basic reference frame (BRF), which extraction biasing effect shear maximized. In study, new computational inexpensive procedure proposed to identify BRF three-dimensional flow field. addition, influence compressibility effects on some statistical properties turbulent...

Abstract Improving our fundamental understanding of multiphase turbulent flows will be beneficial for analyses a wide range industrial and geophysical processes. Herein, we investigate the topology local flow in vaporizing forced homogeneous isotropic two-phase flows. The invariants velocity-gradient, rate-of-strain, rate-of-rotation tensors, scalar gradient were computed conditioned different distances from liquid–gas surface. A Schur decomposition velocity tensor into normal non-normal...

In compressible computational fluid dynamics, the step size of explicit time integration schemes is often constrained by stability when high-order accurate spatial discretizations are used. We report a set new optimized Runge–Kutta for systems ordinary differential equations arising from discretization wave propagation problems with entropy stable collocated discontinuous Galerkin methods. The eigenvalues discrete operator advection equation and an isentropic vortex Euler various values...

The present investigation targets the generation of airfoil trailing-edge broadband noise that arises from interaction turbulent boundary layer with trailing edge. Large-eddy simulations, carried out using a massively parallel compressible solver CharLESX, are conducted for Controlled-Diffusion (CD) rounded edge seven configurations, characterized Reynolds number, angle attack and Mach number. An analysis unsteady pressure signals in is proposed regard to classical modelling ingredients.

For safety considerations pertaining to the high-pressure storage of gases, such as hydrogen, understanding gas release dynamics in case failure is crucial. Limited quantitative information exists on near-field properties jets, which play a pivotal role establishing accurate decay laws far-field. This study conducts simulations highly underexpanded (high-pressure) encompassing six different gases. uses direct numerical simulation under-expanded compressible round jet, with focus velocity...

This study introduces a finite volume solver that utilizes an accurate conservative level set (ACLS) method to model incompressible two-phase flows. Sharp fluid interfaces can be accurately captured by the ACLS method, which is combined with more recent reinitialization technique preserve function's signed distance property. The solver's effectiveness tested using two well-established tests in literature, namely hyperbolic linear advection of Zalesak disc and serpentine. Results from both...

Slurry transportation via pipelines is essential for global industries, offering efficiency and environmental benefits. Specifically, the precise calibration of physical parameters transporting raw phosphate material to fertilizer plants crucial minimize energy losses ensure secure operations. Computational fluid dynamics (CFD) commonly employed understand solid concentration, velocity distributions, flow pressure along pipeline. However, numerical solutions slurry flows often entail...

The injection of high-pressure jets into quiescent air poses significant challenges in fluid dynamics, pertinent to various industrial engineering applications. This study used large eddy simulations on a massively parallel computational framework, employing grid over 600 million nodes, investigate the behavior highly underexpanded sonic from elliptical nozzles at nozzle pressure ratio 15. Three nozzles, with aspect ratios 1.5, 2.2, and 3.0, each having sectional area equivalent that...

We study the anisotropic, incompressible Cahn-Hilliard-Navier-Stokes system with variable density in a bounded smooth domain $\Omega \subset \mathbb{R}^d$. This work extends previous studies on isotropic case by incorporating anisotropic surface energy, represented $\mathfrak{F}= \int_{\Omega} \frac{\epsilon}{2}\, \Gamma^2(\nabla \phi) $. The thermodynamic consistency of this system, as well its modeling background and physical motivation, has been established [3,5,7]. Using Galerkin...

In this study, a new set of direct numerical simulations is generated and used to examine the influence mixture composition heterogeneities on propagation premixed iso-octane/air spherical turbulent flame, with representative chemical description. The dynamic effects both turbulence combustion are considered, their competition assessed. results homogeneous case compared those heterogeneous cases which characterized by multiple stratification length scales segregation rates in regime wrinkled...

View Video Presentation: https://doi.org/10.2514/6.2021-0633.vid In this work, we design a new set of optimized explicit Runge--Kutta schemes for the integration systems ordinary differential equations arising from spatial discretization wave propagation problems with entropy stable collocated discontinuous Galerkin methods. The optimization time is based on spectrum discrete operator advection equation. To demonstrate efficiency and accuracy compared to some widely used classic methods,...

View Video Presentation: https://doi.org/10.2514/6.2021-1446.vid The study of compressibility effects on the dynamics and structure turbulence is an important, but difficult, topic in modeling. Taking advantage a recently proposed Schur decomposition approach (Keylock, C. J., velocity gradient tensor for turbulent flows, Journal Fluid Mechanics, 2018) to decompose into its normal non-normal parts, here we evaluate influence some statistical properties structures. We perform set direct...