A5079623380- Lattice Boltzmann Simulation Studies
- Fluid Dynamics and Turbulent Flows
- Aerosol Filtration and Electrostatic Precipitation
- Fluid Dynamics and Vibration Analysis
- Cardiovascular Health and Disease Prevention
- Renal and Vascular Pathologies
- Aerodynamics and Acoustics in Jet Flows
- Fluid Dynamics and Mixing
- Innovative Microfluidic and Catalytic Techniques Innovation
- Fluid Dynamics and Heat Transfer
- MRI in cancer diagnosis
- Hemodynamic Monitoring and Therapy
- Heat and Mass Transfer in Porous Media
- Minerals Flotation and Separation Techniques
- Cardiac Imaging and Diagnostics
- Generative Adversarial Networks and Image Synthesis
- Meteorological Phenomena and Simulations
- Particle Dynamics in Fluid Flows
- Combustion and flame dynamics
- Plant Water Relations and Carbon Dynamics
- Advanced MRI Techniques and Applications
- Mechanical Circulatory Support Devices
- Medical Image Segmentation Techniques
- Pregnancy and preeclampsia studies
- Surface Modification and Superhydrophobicity
Indiana University – Purdue University Indianapolis
2015-2024
University of Indianapolis
2014-2024
Purdue University in Indianapolis
2024
Indiana University School of Medicine
2022-2023
China Jiliang University
2013-2021
Indiana University
2015-2021
Whitney Museum of American Art
2018
Johns Hopkins University
2009-2011
Texas A&M University
2002-2007
Zhejiang Normal University
2000-2001
Decaying homogeneous isotropic turbulence in inertial and rotating reference frames is investigated to evaluate the capability of lattice Boltzmann method turbulence. In frame case, decay exponents kinetic energy dissipation low wave-number scaling spectrum are studied. The results agreement with classical ones. frame-rotation simulations show that rate decreases decreasing Rossby number as cascade inhibited by rotation, again physics. These clearly indicate captures important features decaying
A recently developed public turbulence database system (http://turbulence.pha.jhu.edu) provides new ways to access large datasets generated from high-performance computer simulations of turbulent flows perform numerical experiments. The archives 10244 (spatial and time) data points obtained a pseudo-spectral direct simulation (DNS) forced isotropic turbulence. flow's Taylor-scale Reynolds number is Re λ=443, the output spans about one large-scale eddy turnover time. Besides stored velocity...
In this work we systematically study one square jet (AR=1) and four rectangular jets with an aspect ratio of width over height AR=1.5,2,2.5, 3 respectively using the lattice Boltzmann method for direct numerical simulation. Focuses are on various flow properties transverse planes downstream to investigate correlation between velocity secondary flow. Three distinct regions development identified in all five jets. As length PC (potential core) region maintains about same, that CD...
We perform large eddy simulation (LES) of the near field low aspect ratio (AR) rectangular turbulent jets (RTJ) using lattice Boltzmann method. The computational technique combines a D3Q19 multiple relaxation time (MRT) equation (LBE) with Smagorinsky model for subgrid stress. First and foremost, we demonstrate that MRT-LBE is more suitable than widely used single-relaxation-time LBE LES flows. Then, proceed to compute four MRT-LBE: AR-1, 1.5, 2, 5; exit velocity u0(m∕s)-60, 39, 60, 23;...
We study the time evolution of velocity and pressure gradients in isotropic turbulence, by quantifying their decorrelation scales as one follows fluid particles flow. The Lagrangian analysis uses data a public database generated using direct numerical simulation Naiver-Stokes equations, at Reynolds number 430. It is confirmed that when averaging over entire domain, correlation functions decay on timescales order mean Kolmogorov turnover scale, computed from globally averaged rate dissipation...
In this paper, we develop a mass-conserved volumetric lattice Boltzmann method (MCVLBM) for numerically solving fluid dynamics with willfully moving arbitrary boundaries. MCVLBM, particles are uniformly distributed in cells and the equations deal time evolution of particle distribution function. By introducing parameter $\mathcal{P}(x,y,z,t)$ defined as occupation solid volume cell, distinguish three types simulation domain: cell (pure occupation, $\mathcal{P}=1$), $\mathcal{P}=0$), boundary...
We numerically study coalescence of air microbubbles in water, with density ratio 833 and viscosity 50.5, using lattice Boltzmann method. The focus is on the effects size inequality parent bubbles interfacial dynamics time. Twelve cases, varying large to small bubble from 5.33 1, are systematically investigated. “coalescence preference,” coalesced closer larger bubble, well observed captured power‐law relation between preferential relative distance χ γ, , consistent recent experimental...
In this paper we present a lattice Boltzmann model to simulate compressible flows by introducing an attractive force. This scheme has two main advantages: one is soften sound speed effectively, which greatly raises the Mach number (up 5); another its relative simple procedure. Simulations of March cone and comparison between theoretical expectations simulations demonstrate that effective in simulation with high numbers, would create many new applications.
Inlet and outlet boundary conditions (BCs) play an important role in newly emerged image-based computational hemodynamics for blood flows human arteries anatomically extracted from medical images. We developed physiological inlet BCs based on patients’ data integrated them into the volumetric lattice Boltzmann method. The BC is a pulsatile paraboloidal velocity profile, which fits real arterial shape, constructed Doppler waveform. of each pressure calculated three-element Windkessel model,...
Porous materials present significant advantages for absorbing radioactive isotopes in nuclear waste streams. To improve absorption efficiency treatment, a thorough understanding of the diffusion-advection process within porous structures is essential material design. In this study, we advancements volumetric lattice Boltzmann method (VLBM) modeling and simulating pore-scale geopolymer structures. These are created using phase field (PFM) to precisely control pore architectures. our VLBM...
Renal arterial stenosis (RAS) often causes renovascular hypertension, which may result in kidney failure and life-threatening consequences. Direct assessment of the hemodynamic severity RAS has yet to be addressed. In this work, we present a computational concept derive new, noninvasive, patient-specific index assess predict potential benefit patient from stenting therapy. The is derived functional relation between translesional pressure indicator (TPI) lumen volume reduction (S) through...
This work is motivated by an experiment of microbubble transport in a polymer microfluidic gas generation device where coalescence-induced detachment exhibits. We numerically study three-dimensional coalescence using the graphics processing unit accelerating free energy lattice Boltzmann method with cubic polynomial boundary conditions. The focus on (CIMD) microfluidics. From experimental observation, we identified that size inequality between two-parent bubbles and father (large) bubble are...
Abstract Image-based computational fluid dynamics (CFD) has become a new capability for determining wall stresses of pulsatile flows. However, platform that directly connects image information to is lacking. Prevailing methods rely on manual crafting hodgepodge multidisciplinary software packages, which usually laborious and error-prone. We present platform, compute in image-based flows using the volumetric lattice Boltzmann method (VLBM). The novelty includes: (1) unique processing extract...