... Abstract The capture of small particles at the interface of large deformable drops and the subsequent evolution of particle surface distribution in turbulent flow are investigated. Direct numerical simulation of turbulence, phase field modeling of the drop interface dynamics and Lagrangian...

... Abstract We use pseudo-spectral Direct Numerical Simulation (DNS), coupled with a Phase Field Method (PFM), to investigate the turbulent Poiseuille flow of two immiscible liquid layers inside a channel. The two liquid layers, which have the same thickness (h 1 = h 2 = h), are characterized...

... Abstract Experimental investigations of a single half-stepped cylinder and a half-stepped cylinder sheet placed on a flat plate inside a turbulent boundary layer at zero pressure gradient have been performed. The goal of the study was to investigate whether a half-stepped cylinder could be used...

... Abstract Analysis of a strong turbulence effect on electromagnetic wave propagation requires extensive knowledge of the earth’s atmospheric phenomena and Maxwell’s electromagnetic theory of light propagation. Strong atmospheric Turbulence often encounters optical systems’ propagation, causing...

... Abstract We study the heat transfer process in a multiphase turbulent system composed by a swarm of large and deformable drops and a continuous carrier phase. For a shear Reynolds number of Re = 300 and a constant drops volume fraction of Θ = 5.4%, we perform a campaign of direct numerical...

... with the frequency of 32 Hz, which subsequently generates lots of small wakes to the jet downstream. It is found that the turbulent heat flux 〈w′T′〉 is larger in the jet-to-jet border because of the interaction while the turbulent heat flux 〈u′T′〉 is larger at the jet rear because of the velocity acceleration...

...-resolving simulations using spectral element numerical methods. computational fluid dynamics spectral element method turbulence large-eddy simulation wall functions Proceedings of the ASME 2022 Fluids Engineering Division Summer Meeting FEDSM2022 August 3-5, 2022, Toronto, Ontario, Canada...

... into a sedentary secondary fluid. Entrainment is governed by pressure gradients and turbulent mixing and so turbulent quantities that measure these processes are extracted and analyzed according to the independent variable’s effects on these quantities. Pitot probe testing extracted one dimensional fluid...

... Abstract Turbulence is one of the most important phenomena in fluid dynamics. In general, turbulent phenomena can be resolved more clearly with Large Eddy Simulation (LES) compared with Unsteady Reynolds Averaged Navier-Stokes (URANS), and the numerical solution shows good agreements...

... on mean velocity and void ratio field, statistical turbulent quantities in three different cavitation levels with the same reference velocity. A type of cavitation associated with a weak but persistent re-entrant jet is described. The comparison between the cavitation and the noncavitating flow shows...

... Abstract We tested Artificial Neural Networks (ANNs) to predict a fully-developed turbulent channel flow of a viscoelastic fluid in preparation for elucidating flow phenomenon and solving the difficulty in DNS (Direct Numerical Simulation) due to numerical instability of the viscoelastic fluid...

... Abstract Recent developments in wind turbine design research account for the effects of velocity fluctuation and the characteristic turbulence of the installation location site to improve performance. For the design, a low-cost natural wind generator and a laboratory-based performance...

... of Nusselt number, Nu , normalized by the unperturbed reference Nu 0 . The shortest, 25.4 mm high flexible strip resulted in the highest peak and overall heat transfer enhancement. The distribution of the local heat transfer enhancement is found to correlate well with the turbulent flow motion detailed...

... sediments, based on the velocity and turbulence profiles and on the interface shear stress values. For that purpose, experiments on natural sediments collected in two estuaries and on a variety of artificial beds were carried out in a circular mini flume, 131 mm in diameter. Velocity profiles and turbulence...

... to an incompressible-flow RANS solver, based on a two-equation turbulence model, to perform unsteady numerical simulations of airflow past the NACA-0012 airfoil for several angles of attack and Reynolds numbers of 5.0x105 and 1.8x106. Qualitative characterizations of the flow in the vicinity of the airfoil...

... walls under turbulent flow regime was studied. The cases that the flow is downward and upward, and when the flow is warmer than the walls were analyzed. The V2F turbulence model was used in the computational model so that the intensity of the turbulence velocity fluctuations normal to the wall can...

... CFD Turbulence Scale-Adaptive Simulation massive separation airfoil The Scale Adaptive Simulation (SAS) models can keep standard RANS capabilities in stable flow regions but resolve turbulent structures in unsteady regions of flow field like LES. This RANS/LES property of SAS model...

... and turbulence intensity distributions are found to be axisymmetric due to the geometry of the combustor. The variation in pressure and velocity with locations and Reynolds number was studied. The velocity variation near the surface of the combustor (r/R = 0.66) was showing the opposite behaviour upto x/h...

... OF FLUID FLOW IN PEBBLE BED MODULAR REACTOR USING DIFFERENT TURBULENCE MODELS Akshay Gandhir Department of Mechanical Engineering Texas A&M University College Station, Texas 77840 Email: [email protected] Dr. Yassin Hassan Department of Nuclear Engineering Texas A&M University College Station...

... airways were analyzed. The results were compared with experimental measurements, and carcinogenicity of these fibers was discussed. Asbestos elongated mineral particles (EMP) fiber transport deposition tracheobronchial tree numerical simulation airway bifurcation model turbulence...