Evaluation of Propeller Virtual Mass and Damping Coefficients by URANS- Method
Ocean Engineering, 2015 The virtual mass and damping coefficients of a rotating propeller are determined using URANS computations. Time-accurate simulations are carried out for an open propeller forced to harmonic motion in two separate directions, translational x1- and rotational x4-directions.
Sánchez-Caja, Antonio +3 more
core +12 more sources
On the Reliability of Eddy Viscosity Based Turbulence Models in Predicting Turbulent Flow past a Circular Cylinder Using URANS Approach [PDF]
Journal of Applied Fluid Mechanics, 2012 Turbulent flow past circular cylinder at moderate to high Reynolds number has been analysed employing an secondorder time accurate pressure-based finite volume method solving two-dimensional Unsteady Reynolds Averaged Navier Stokes (URANS) equations ...
B.N Rajani, A. Kandasamy, S. Majumdar
doaj +1 more source
Direct Numerical Simulations of Inhalation in a 23-Generation Lung Model. [PDF]
Int J Numer Method Biomed EngThe first direct numerical simulation of a 23‐bifurcation lung model is carried out. Fast and intense oscillations in the laminar flow are found in deep generations: their time scales are related to the upstream pressure fluctuations, and their intensity is related to upstream flow‐splitting fluctuations.
Atzori M +4 more
europepmc +2 more sources
Comparison of a Miniaturized Implantable Two-Stage Rotodynamic Blood Pump to Equivalent Single-Stage Concepts. [PDF]
Artif OrgansThis study aims to evaluate the potential of a multistage pump design to enhance hemocompatibility in left ventricular assist devices. We found that the two‐stage concept offers favorable hemolysis measures compared to single‐stage designs, as the reduction in peak shear stresses outweighs the disadvantage associated with prolonged residence time ...
Linnemeier S +6 more
europepmc +2 more sources
, 2022 Since the 1990s, RANS practitioners have observed spontaneous unsteadiness in RANS simulations. Some have suggested deliberately using this as a method of resolving large turbulent structures.
Israel, Daniel
core +1 more source
Patient-Specific Computational Fluid Dynamics Modeling of Airway Collapse in Infants With Robin Sequence. [PDF]
Int J Numer Method Biomed EngThis study presents a novel method to analyze the airflow dynamics across the full respiratory cycle in Robin Sequence infants with upper airway obstruction or collapse. It uses 4DCT‐derived airway anatomy and wall movement combined with Computational Fluid Dynamics simulations.
Jalori G +5 more
europepmc +2 more sources
Numerical Study on the Waterjet–Hull Interaction of a Free-Running Catamaran
Journal of Marine Science and Engineering, 2023 Waterjet–hull interaction is the hot point and research focus in the research of waterjet-propelled crafts. This paper presents numerical studies on the interaction between a waterjet system and a catamaran.
Yanlin Zou +4 more
doaj +1 more source
A RANS Modelling Approach for Predicting Powering Performance of Ships in Waves [PDF]
, 2013 In this paper, a modelling technique for simulating selfpropelled ships in waves is presented. The flow is modelledusing a RANS solver coupled with an actuator diskmodel for the propeller.
Hudson, Dominic +7 more
core +1 more source
Two-way coupled fluid-structure interaction method on aerodynamic analysis of tall timber building using URANS [PDF]
, 2021 The structural response of tall building to aerodynamic excitation can be simulated with the use of computational fluid dynamics (CFD) for wind flow and finite element method (FEM) for structural modelling.
Hon, Koh Chuen
core +1 more source
Grid resolution assessment method for hybrid RANS-LES in turbomachinery
Engineering Applications of Computational Fluid Mechanics, 2022 Hybrid RANS-LES is a promising method for analyzing the complex flow structure in turbomachinery due to its excellent compromise between accuracy and computational cost.
Ruiyu Li +4 more
doaj +1 more source