Theoretical and Computational Fluid Dynamics
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Lattice Boltzmann methods for global linear instability analysis
Theoretical and Computational Fluid Dynamics - Tập 31 Số 5-6 - Trang 643-664 - 2017
Systolic anterior motion in hypertrophic cardiomyopathy: a fluid–structure interaction computational model
Theoretical and Computational Fluid Dynamics - Tập 35 - Trang 381-396 - 2021
We present direct numerical simulations for the pathophysiology of hypertrophic cardiomyopathy of the left ventricle of the human heart. This cardiovascular disorder manifests itself through systolic anterior motion (SAM), a drift of the mitral leaflets towards the aortic subvalvular region, sometimes causing ventricular obstruction during systole. This pathology is induced by a combination of fac...... hiện toàn bộ
Numerical realization of helical vortices: application to vortex instability
Theoretical and Computational Fluid Dynamics - Tập 34 - Trang 1-20 - 2019
The need to numerically represent a free vortex system arises frequently in fundamental and applied research. Many possible techniques for realizing this vortex system exist but most tend to prioritize accuracy either inside or outside of the vortex core, which therefore makes them unsuitable for a stability analysis considering the entire flow field. In this article, a simple method is presented ...... hiện toàn bộ
Boundary film shear elastic modulus effect in hydrodynamic contact. Part I: theoretical analysis and typical solution
Theoretical and Computational Fluid Dynamics - Tập 23 - Trang 239-254 - 2009
Boundary film shear elastic modulus effect is analyzed in a hydrodynamic contact. The contact is one-dimensional composed of two parallel plane surfaces, which are, respectively, rough rigid with rectangular micro projections in profile periodically distributed on the surface and ideally smooth rigid. The whole contact is consisted of cavitated area and hydrodynamic area. The hydrodynamic area con...... hiện toàn bộ
A numerical investigation into the effects of Reynolds number on the flow mechanism induced by a tubercled leading edge
Theoretical and Computational Fluid Dynamics - Tập 31 - Trang 1-32 - 2016
Leading-edge modifications based on designs inspired by the protrusions on the pectoral flippers of the humpback whale (tubercles) have been the subject of research for the past decade primarily due to their flow control potential in ameliorating stall characteristics. Previous studies have demonstrated that, in the transitional flow regime, full-span wings with tubercled leading edges outperform ...... hiện toàn bộ
Turbulent Dynamics of a Critically Reflecting Internal Gravity Wave
Theoretical and Computational Fluid Dynamics - Tập 11 - Trang 281-303 - 1998
Results from computational fluid dynamics experiments of internal wave reflection from sloping boundaries are presented. In these experiments the incident wave lies in a plane normal to the slope. When the angle of wave energy propagation is close to the bottom slope the reflection causes wave breakdown into a quasi-periodic, turbulent boundary layer. Boundary layer energetics and vorticity dynam...... hiện toàn bộ
Global modes in a confined impinging jet: application to heat transfer and control
Theoretical and Computational Fluid Dynamics - Tập 25 - Trang 179-193 - 2010
We investigate the stability and control of a plane, laminar jet impinging on a flat plate in a channel, a geometry used to cool down a hot wall with a cold air jet in many industrial configurations. The global stability analysis indicates that, even for a strong confinement, the two-dimensional (2-D) steady flow is unstable to three-dimensional (3-D), steady perturbations. In the simplest limit c...... hiện toàn bộ
The effects of acceleration in jets: kinematics of the near field vortices
Theoretical and Computational Fluid Dynamics - Tập 23 - Trang 287-296 - 2009
Direct and large-eddy simulations (DNS/LES) of accelerating round jets are used to analyze the effects of acceleration on the kinematics of vortex rings in the near field of the jet (x/D < 12). The acceleration is obtained by increasing the nozzle jet velocity with time, in a previously established (steady) jet, and ends once the inlet jet velocity is equal to twice its initial value. Several acce...... hiện toàn bộ
Inverted stochastic lattice Boltzmann-Lagrangian model for identifying indoor particulate pollutant sources
Theoretical and Computational Fluid Dynamics - Tập 37 - Trang 755-765 - 2023
This paper studies the inverted stochastic lattice Boltzmann-Lagrangian approach for identifying indoor particulate pollutant sources. The dynamics of the fluid (indoor air) as well as the transport of the particles in the Eulerian description are solved using the lattice Boltzmann method. The particles regard as rigid bodies, and the data interactions between lattice fluid and particle movement a...... hiện toàn bộ
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