Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 12 of 12 for “"Square duct"”.
-
Large Eddy Simulations of Particle Dispersion and Deposition in a Turbulent Square Duct Flow
Deposition of particles in a square duct is the focus of the second set of simulations. Ten particle response times are studied. Simulations are carried out using one-way coupling as well as select cases using two- and four-way coupling. A particle-particle collision algorithm has been developed. …
-
Evaluation of Universal Docking Solutions for Autonomous Underwater Vehicles
… an external appendage guided into position by a square duct. MATLAB simulations evaluate these two charging station designs for compatibility with AUVs, alignment capabilities, and docking efficacy under realistic conditions. Both designs are tested through Monte Carlo simulations to address …
-
Development and application of Lattice Boltzmann and accurate volume of fluid numerical techniques on graphics processing units
… droplet collisions, droplet deformation in a square duct, and displacement flow in complex micro-channels. Both SC and HC methods were able to model liquid-liquid flow, whose density ratio is less than 2, but both methods were unstable for gas-liquid flow. To handle large density ratios, we …
-
Adjoint-based optimization of U-bend channel flow using a multi-fidelity eddy viscosity turbulence model
… presents CFD simulation of a 180 degree U-bend square duct using low-fidelity steady RANS and high-fidelity wall-resolved Large Eddy Simulation (LES) models. The LES solution is shown to match experimental results, whereas the RANS solution is not sufficiently accurate. A process for training a …
-
Lattice Boltzmann simulations of multiphase flows
… of axial droplet migration and deformation in a square-duct at moderate Reynolds number. Our results suggest that the LBM algorithm is capable of simulating a wide range of flows and can accurately capture flow physics provided the density ratio among fluid phases is not large. Because ACRC …
-
Implementation of a non-linear eddy viscosity turbulence model into Hydra-TH for fuel related applications
… 'classic' engineering test cases of flow in a square duct and a U-channel bend in order to highlight the relative merits and deficiencies of the quadratic model. Next, the quadratic model is validated on triangular and square rod fuel array test cases that are representative of the flow profile …
-
Reynolds-Averaged Navier-Stokes Computation of Tip Clearance Flow in a Compressor Cascade Using an Unstructured Grid
… arc cascade and laminar flow through a square duct with 90° bend. For the laminar flat plate case, the velocity profile and skin friction coefficient are in excellent agreement with Blasius solution. For the turbulent flat plate case, velocity profiles are in full agreement with the law …
-
Development and application of a dispersed two-phase flow capability in a general multi-block Navier Stokes solver
… of interest being the internal cooling ribbed duct of the turbine blade. The presence of serpentine passages and strong localized cross flow components makes this region prone to deposition, erosion, and corrosion (DEC) by sand particles. A Lagrangian particle tracking technique was implemented …
-
Modeling transient multiphase flow and mold top surface behavior in steel continuous casting
… and to improving the quality of the final products. To better understand the gas injection process, a new model is developed to investigate gas permeating through heated upper tundish nozzle (UTN) porous refractory, including the effects of nozzle geometry, gas thermal expansion, …
-
Studies of turbulent flows in continuous casting of steel with and without magnetic field
… simulations are first performed in channel, square and 2:1 aspect rectangular ducts to investigate the effect of magnetic field on turbulent flows. The rectangular duct is a more practical geometry for continuous casting nozzle and mold and has the option of applying magnetic field either …
-
Modeling of three-dimensional viscoelastic flows with free surfaces using a finite element method
… three-dimensional velocity field in flow of a square duct in agreement with Yue et al. Elastically-driven flow transitions from a two-dimensional, steady flow to a three-dimensional, time periodic flow also motivate the need for three-dimensional solvers, which should be able to capture the …