dc.contributor.advisor	Ravindra, Brahmajosyula
dc.contributor.advisor	Prakash, Akshay
dc.creator.researcher	Agarwal, Alankar
dc.date.accessioned	2023-12-06T10:42:35Z
dc.date.available	2023-12-06T10:42:35Z
dc.date.awarded	2022-02
dc.date.issued	2021-09
dc.date.registered	2014-07
dc.description.abstract	The present thesis explores the applicability of the lattice Boltzmann Method (LBM) to validate the turbulent flow simulation in the various complex flow domains. LBM in recent years has emerged as an alternative Computational Fluid Dynamics (CFD) approach other than traditional Navier-Stokes (NS) solvers. The method is based on the discrete numerical approach and solves the kinetic equations to discretize the fluid domain. The fluid in LBM is defined as the particle distribution functions. The computational domain of the fluid flow represents the Eulerian grid nodes, each of which consists of a lattice structure. The lattice structure is comprised of the particle distribution functions, which are restricted to move in specific directions. The research work mainly focuses on modeling large turbulent structures on a grid-scale for high Reynolds number flows with the Large Eddy Simulation (LES) model in the frame of LBM. The turbulent motions smaller than grid size are resolved using the popular Smagorinsky subgrid-scale (SGS) model. The study also gives special attention to investigate the effect of the different discrete velocity models of LBM and boundary conditions on the turbulent flow behavior. The results are presented for various turbulent statistics, including phase-averaged velocities, root-mean-square (RMS) velocity, Reynolds stresses, and turbulent kinetic energy (TKE). Moreover, another important work reported in the thesis is the turbulent flow simulation in the stirred tank reactor equipped with dual-Rushton impellers. The study shows the LBM capability to simulate the turbulent flow in such complex geometry. The work also investigates the effect of baffles on the flow hydrodynamics at different impeller clearance. The study compares the results at different impeller clearance in the presence and absence of baffles. The obtained results are validated with the experimental data available in the literature. The thesis work also presents the efficiency of the LBM algorithm on multi-core computer hardware. A highly parallelized computer code was developed using Compute Unified Device Architecture (CUDA) programming language to execute on Graphics Processing Units (GPUs) parallel platform. The computational performance of the algorithm is measured from the Millions Lattice Updates Per Second (MLUPS) parameter. This is obtained from the simulation run-time of the code on the multi-cores of the GPU. The computational scaling of the code is addressed in the study by executing the code at varying numbers of cores. The three-dimensional (3-D) approach of the domain decomposition is employed to increase the scalability. In conclusion, the research studies performed in the present thesis show the LBM viability as a feasible tool for the turbulent flow simulation at high Reynolds numbers with good accuracy and high computational efficiency for various simple to complex flow domains.	en_US
dc.description.note	col. ill.; including bibliography	en_US
dc.description.statementofresponsibility	by Alankar Agarwal	en_US
dc.format.accompanyingmaterial	CD	en_US
dc.format.extent	xvi, 75p.	en_US
dc.identifier.accession	TP00116
dc.identifier.citation	Agarwal, Alankar. (2021). Analysis of Lattice Boltzmann Method for Turbulent Flow Simulation on Multi-core GPU Architecture (Doctor's thesis). Indian Institute of Technology Jodhpur, Jodhpur.	en_US
dc.identifier.uri	https://ir.iitj.ac.in/handle/123456789/126
dc.language.iso	en
dc.publisher	Indian Institute of Technology Jodhpur
dc.publisher.department	Mechanical Engineering	en_US
dc.publisher.place	Jodhpur
dc.rights.holder	IIT Jodhpur
dc.rights.license	CC-BY-NC-SA
dc.subject.ddc	Mechanical Engineering	en_US
dc.subject.ddc	Lattice Boltzmann Method	en_US
dc.subject.ddc	GPU Architecture	en_US
dc.title	Analysis of Lattice Boltzmann Method for Turbulent Flow Simulation on Multi-core GPU Architecture	en_US
dc.type	Thesis

Analysis of Lattice Boltzmann Method for Turbulent Flow Simulation on Multi-core GPU Architecture

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