123 citations · 486 across the 17 of their papers we have counts for
18 papers
Assessment of Immersed Boundary Methods for Hypersonic Flows with Gas-Surface Interactions
Ata Onur Başkaya, Michele Capriati, Alessandro Turchi +2
Immersed boundary (IB) methods with adaptive mesh refinement (AMR) techniques are assessed for atmospheric entry applications, including effects of chemical nonequilibrium (CNE) an…
Turbulence and added drag over acoustic liners
Haris Shahzad, Stefan Hickel, Davide Modesti
We present pore-resolved direction numerical simulations (DNS) of turbulent flows grazing over perforated plates, that closely resemble the acoustic liners found on aircraft engine…
Large eddy simulations of reacting and non-reacting transcritical fuel sprays using multiphase thermodynamics
Mohamad Fathi, Stefan Hickel, Dirk Roekaerts
Accurate simulations of high-pressure transcritical fuel sprays are essential for the design and optimization of next-generation gas turbines, internal combustion engines, and liqu…
Permeability and turbulence over perforated plates
Haris Shahzad, Stefan Hickel, Davide Modesti
We perform direct numerical simulations of turbulent flow at friction Reynolds number grazing over perforates plates with moderate viscous-scaled orifice dia…
Low-frequency unsteadiness mechanisms in shock wave/turbulent boundary layer interactions over a backward-facing step
Weibo Hu, Stefan Hickel, Bas W. van Oudheusden
The low-frequency unsteady motions behind a backward-facing step (BFS) in a turbulent flow at and is investigated using a well-resolved large…
Customized data-driven RANS closures for bi-fidelity LES-RANS optimization
Yu Zhang, Richard P. Dwight, Martin Schmelzer +3
Multi-fidelity optimization methods promise a high-fidelity optimum at a cost only slightly greater than a low-fidelity optimization. This promise is seldom achieved in practice, d…
Rapid multi-component phase-split calculations using volume functions and reduction methods
Mohamad Fathi, Stefan Hickel
We present a new family of fast and robust methods for the calculation of the vapor-liquid equilibrium at isobaric-isothermal (PT-flash), isochoric-isothermal (VT-flash), isenthalp…
Rossby Number Effects on Columnar Eddy Formation and the Energy Dissipation Law in Homogeneous Rotating Turbulence
Tiago Pestana, Stefan Hickel
Two aspects of homogeneous rotating turbulence are quantified through forced Direct Numerical Simulations in an elongated domain, which is in the direction of rotation about …
Regime Transition in the Energy Cascade of Rotating Turbulence
Tiago Pestana, Stefan Hickel
Transition from a split to a forward kinetic energy cascade system is explored in the context of rotating turbulence using direct numerical simulations with a three-dimensional iso…
Experimental and Numerical Investigation of Phase Separation due to Multi-Component Mixing at High-Pressure Conditions
Christoph Traxinger, Hagen Müller, Michael Pfitzner +7
Experiments and numerical simulations were carried out in order to contribute to a better understanding and prediction of high-pressure injection into a gaseous environment. Specif…
Adaptive Reduced-Order Modeling for Non-Linear Fluid-Structure Interaction
Ali Thari, Vito Pasquariello, Niels Aage +1
We present an adaptive reduced-order model for the efficient time-resolved simulation of fluid-structure interaction problems with complex and non-linear deformations. The model is…
Multi-component vapor-liquid equilibrium model for LES and application to ECN Spray A
Jan Matheis, Stefan Hickel
We present and evaluate a detailed multi-species two-phase thermodynamic equilibrium model for large-eddy simulations (LES) of liquid-fuel injection and mixing at high pressure. Th…
A cut-cell finite volume - finite element coupling approach for fluid-structure interaction in compressible flow
Vito Pasquariello, Georg Hammerl, Felix Örley +5
We present a loosely coupled approach for the solution of fluid-structure interaction problems between a compressible flow and a deformable structure. The method is based on stagge…
A parametrized non-equilibrium wall-model for large-eddy simulations
Stefan Hickel, Emile Touber, Julien Bodart +1
Wall-models are essential for enabling large-eddy simulations (LESs) of realistic problems at high Reynolds numbers. The present study is focused on approaches that directly model…
Benchmarking in a rotating annulus: a comparative experimental and numerical study of baroclinic wave dynamics
Miklos Vincze, Sebastian Borchert, Ulrich Achatz +11
The differentially heated rotating annulus is a widely studied tabletop-size laboratory model of the general mid-latitude atmospheric circulation. The two most relevant factors of…
DNS and LES of two-phase flows with cavitation
Stefan Hickel
We report on recent progress in the physical and numerical modeling of compressible two-phase flows that involve phase transition between the liquid and gaseous state of the fluid.…
On the Richtmyer-Meshkov instability evolving from a deterministic multimode planar interface
V. K. Tritschler, B. J. Olson, S. K. Lele +3
We investigate the shock-induced turbulent mixing between a light and heavy gas, where a Richtmyer-Meshkov instability (RMI) is initiated by a $\Ma = 1.5$ shock wave. The prescribe…
Implicit Large Eddy Simulation of Cavitation in Micro Channel Flows
S Hickel, M. Mihatsch, S. J. Schmidt
We present a numerical method for Large Eddy Simulations (LES) of compressible two-phase flows. The method is validated for the flow in a micro channel with a step-like restriction…