Results 31 to 40 of about 55,167 (191)

Performance of turbulence and cavitation models in prediction of incipient and developed cavitation [PDF]

, 2017
The aim of this article is to assess the impact of turbulence and cavitation models on the prediction of diesel injector nozzle flow. Two nozzles are examined, an enlarged one, operating at incipient cavitation, and an industrial injector tip, operating ...
Afzal H, Brennen C, Caupin F, Coutier-Delgosha O, Edelbauer W, Franc J-P, Homa Naseri, Manolis Gavaises, Okabayashi K, Phoevos Koukouvinis, Reboud J-L, Sagaut P, Schmidt D, Schnerr GH, Versteeg H, Wilcox D, Zwart PJ   +16 more
core   +1 more source

Using physics‐informed neural networks to quantify submarine groundwater discharge under high‐frequency tidal dynamics using heat as a tracer

Limnology and Oceanography: Methods, EarlyView.
Abstract Estimating exchange rates of submarine groundwater discharge (SGD) at high temporal resolution over extended periods remains challenging, particularly when using heat as a tracer in highly dynamic environments such as tidal systems. Currently available heat transport models struggle to accurately quantify SGD exchange rates in these settings ...
S. Frei, M. U. Munir, A. M. Seiverth, B. S. Gilfedder   +3 more
wiley   +1 more source

Turbulence modeling for hypersonic flows [PDF]

Turbulence modeling for high speed compressible flows is described and discussed. Starting with the compressible Navier-Stokes equations, methods of statistical averaging are described by means of which the Reynolds-averaged Navier-Stokes equations are ...
Coakley, T. J., Marvin, J. G.
core   +1 more source

Numerical Insights Into the Resistance Reduction Mechanisms of Forward Tapered Transoms in High‐Speed Catamaran: A Computational Fluid Dynamics‐Based Study

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT This study investigates the hydrodynamic influence of forward transom tapering on a displacement catamaran hull using computational fluid dynamics (CFD) simulations. Five taper configurations ranging from a vertical transom base design to a fully tapered stern (1.00B) were evaluated over a wide Froude number range (Fr = .3 to 1.0).
Chalermkiat Nuchturee, Chairat Napasaksri, Ramil Kesvarakul, Sarawuth Srinakaew   +3 more
wiley   +1 more source

Calculations of High-Temperature Jet Flow Using Hybrid Reynolds-Average Navier-Stokes Formulations [PDF]

Two multiscale-type turbulence models are implemented in the PAB3D solver. The models are based on modifying the Reynolds-averaged Navier Stokes equations.
Abdol-Hamid, Khaled S., Elmiligui, Alaa, Giriamaji, Sharath S.   +2 more
core   +1 more source

Where numerical weather prediction meets large‐eddy simulations in a convective boundary layer during the FESSTVaL field experiment

Quarterly Journal of the Royal Meteorological Society, EarlyView.
We exploit the Field Experiment on Sub‐mesoscale Spatio‐Temporal Variability in Lindenberg (FESSTVaL) to compare the performance of an NWP model at sub‐km resolutions with a traditional LES model. Focusing on clear‐sky ABL turbulence (June 14), shallow convective clouds and surface radiation (June 27), and deep convective cold pools (June 29), we find ...
Mirjana Sakradzija, Maike Ahlgrimm, Frank Beyrich, Chiel van Heerwaarden, Eileen Päschke, Ulrich Görsdorf, Bastian Kirsch, Juerg Schmidli, Noviana Dewani   +8 more
wiley   +1 more source

PAB3D: Its History in the Use of Turbulence Models in the Simulation of Jet and Nozzle Flows [PDF]

This is a review paper for PAB3D s history in the implementation of turbulence models for simulating jet and nozzle flows. We describe different turbulence models used in the simulation of subsonic and supersonic jet and nozzle flows.
Abdol-Hamid K., Abdol-Hamid K. S., Abdol-Hamid K. S., Abdol-Hamid K.S., Abdol-Hamid K.S., Abdol-Hamid K.S., Bridges J., Carlson J. R., Carlson J. R., Carlson J. R., Carlson R., Carlson R., Dash M., Deere K. A., Deere K. A., Deere K.A., Deere K.A., Elmiligui A., Görtler H., Hunter A., Jones W.T., Kuhne C. M., Lakshmanan B., Lebedev A. B., Love S., Mani M., Nichols R.H., Nichols R.H., Pao S. P., Potential Core Figure, Reichardt, Ronki M., Seiner J.M., Shih T.H., So R.M.C., Spalart P.R., Theis A. T., Uenishi K., Walter M., Warren R., Jr.   +39 more
core   +2 more sources

Navigating Gravity: Competing Effects Result in Opposing Taxis for Different Janus Swimmers

Small, EarlyView.
The combined effects of gravity and wall‐induced hydrodynamics on the motion of Janus colloids are investigated. Platinum‐ and copper‐coated silica microswimmers show distinct gravitactic alignment near surfaces due to different hydrodynamic couplings. This distinct gravitactic behavior enables separation of initially mixed active particles.
Amir Sheikh Shoaei, Jens‐Uwe Sommer, Juliane Simmchen   +2 more
wiley   +1 more source

Transonic separated flow predictions based on a mathematically simple, nonequilibrium turbulence closure model [PDF]

A mathematically simple, turbulence closure model designed to treat transonic airfoil flows even with massive separation is described. Numerical solutions of the Reynolds-averaged, Navier-Stokes equations obtained with this closure model are shown to ...
Johnson, D. A., King, L. S.
core   +1 more source

Aligning Real‐Time Recurrence Computational Fluid Dynamics Simulations with Plant Data for the Ruhrstahl–Heraeus Degassing Process of Steel

steel research international, EarlyView.
Uncertainties exist in computational fluid dynamics (CFD) modeling of complex metallurgical processes, even when partly validated by laboratory experiments. rCFD enables computationally efficient prediction of long‐term RH degassing and can be adapted to vary flow conditions.
Xiaomeng Zhang, Maria Thumfart, Roman Rössler, Stefan Pirker   +3 more
wiley   +1 more source