A5014325512- Fluid Dynamics and Turbulent Flows
- Wind and Air Flow Studies
- Fluid Dynamics and Vibration Analysis
- Particle Dynamics in Fluid Flows
- Wind Energy Research and Development
- Aerodynamics and Fluid Dynamics Research
- Lattice Boltzmann Simulation Studies
- Wave and Wind Energy Systems
- Coastal and Marine Dynamics
- Computational Fluid Dynamics and Aerodynamics
- Surface Modification and Superhydrophobicity
- Aeolian processes and effects
- Turbomachinery Performance and Optimization
- Image Processing and 3D Reconstruction
- Handwritten Text Recognition Techniques
- Structural Analysis and Optimization
- Evacuation and Crowd Dynamics
- Plasma and Flow Control in Aerodynamics
- Hydraulic flow and structures
- Combustion and flame dynamics
- Fluid Dynamics Simulations and Interactions
- Aerosol Filtration and Electrostatic Precipitation
- Vehicle License Plate Recognition
- Refrigeration and Air Conditioning Technologies
- Numerical methods in engineering
Convergent Science (United States)
2022-2024
Presidency University
2022
Johns Hopkins University
2015-2016
Indian Institute of Technology Kanpur
2011-2015
A new approach for wall modeling in Large-Eddy-Simulations (LES) is proposed and tested various applications. To properly include near-wall physics while preserving the basic economy of equilibrium-type models, we adopt classical integral method von Karman Pohlhausen (VKP). velocity profile with parameters as an alternative to numerical integration boundary layer equations zone. The contains a viscous or roughness sublayer logarithmic additional linear term that can account inertial pressure...
We conduct a series of large-eddy simulations (LES) to examine the mean flow behaviour within roughness layer turbulent boundary over rough surfaces. consider several configurations consisting arrays rectangular-prism elements with various spacings, aspect ratios and height distributions. The results provide clear evidence for exponential respect wall normal distance. Such has been proposed before (see, e.g., Cionco, 1966 Tech. Rep. DTIC document), is represented as $U(z)/U_{h}=\exp...
_ Floating Photovoltaics (FPV) are an emerging technology which has received increasing interest in recent years. In the present study, we introduce a novel approach to model floating solar farms under various wave and wind conditions framework of computational fluid dynamics (CFD). A cut-cell based autonomous meshing is used allows complex moving geometries be represented easily while maintaining high-quality Cartesian cells throughout simulation domain. The wind-wave interface modeled...
Abstract In this work we present a coupled computational fluid dynamics and fluid-structure interaction approach for simulating the of floating offshore wind turbines (FOWTs). The multiphase flow over platform is solved using cartesian cut-cell with an environmental generation module which can model variety wind-wave conditions. This in turn 6-degree-of-freedom to simulate motion, while mooring lines are represented dynamic lumped element model. Finally, actuator line (ALM) used turbine...
The unsteady flow physics and heat transfer characteristics due to interactions of periodic passing wakes with a separated boundary layer are studied using large-eddy simulation (LES). A series airfoils constant thickness rounded leading edge employed obtain the layer. Wake data extracted from precursor LES past cylinder used replicate moving bar that generates in front cascade (in this case, an infinite row model airfoils). This setup is simplified representation rotor–stator interaction...
Abstract Aeroelasticity is recognized as the key enabler that allowed for massive upscaling of wind turbines in last decade, leading to long, slender, and flexible blades equip rotors with lower specific power unprecedented energy conversion capabilities. In this study, a selection case studies increasing size, specifically NREL 5 MW, DTU 10 IEA 15 MW Reference Wind Turbines (RWTs) considered explore what extent aeroelastic effects impact functioning these rotors. The are not only different...
This study presents a methodology for modeling developing turbulent boundary layer flows over surfaces with large (macro-scale) rougness elements, particular application to flow bio-fouled surfaces. A sharp-interface immersed method coupled wall model and large-eddy simulations is used carry out accurate of such macro-bio-fouled Simulation arrays modeled barnacles different barnacle density have been carried out, results are presented on the effect distribution physics, drag Furthermore,...
The unsteady flow physics and heat transfer characteristics due to interactions of periodic passing wakes with a separated boundary layer are studied the help Large-eddy simulations (LES). A flat plate semicircular leading edge is employed obtain layer. Wake data extracted from precursor LES past cylinder used replicate moving bar that generates in front cascade (in this case an infinite row plates). This setup simplified representation rotor-stator interaction turbomachinery. With uniform...
ABSTRACT With only a few floating offshore wind turbine (FOWT) farms deployed anywhere in the world, FOWT technology is still its infancy, building on modicum of real‐world experience to advance nascent industry. To support further development, engineers rely heavily modeling tools accurately portray behavior these complex systems under realistic environmental conditions. This reliance creates need for verification and validation such improve reliability load dynamic response prediction...
Abstract A fully coupled methodology for simulating floating offshore wind turbines is developed within the framework of CONVERGE CFD software. This utilizes following models which are solved together in a manner: wind-wave models, turbine rotor/blade mooring cable and 6-degree-of-freedom rigid-body fluid-structure interaction (FSI) model. The benchmarked with OC4 FOWT experimental simulation data under various conditions. approach then used to study tandem conditions gain an in-depth...
<div class="section abstract"><div class="htmlview paragraph">Fluid-Structure Interaction (FSI) simulation approach can be used to simulate a turbocharger. However, this predictive 3D encounters the challenge of long computational time. The impeller speed above 100,000 rpm, and generally CFD solver limits maximum movement surface per time step. must fraction (~0.3) cell length, thus step will very small. A Multiple Reference Frame (MRF) reduce by eliminating need regenerate mesh...