Browsing by Title
Now showing items 2009-2028 of 3356
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Numerical Analysis of a Compact Helical Counterflow Heat Exchanger
(2018-04)The performance of compact counter flow heat exchangers with helically shaped passages is examined using a 1-D analytical model and compared with a high-fidelity 3-D numerical simulation. The 1-D model is capable of ... -
Numerical and Analytical Modelling for Droplet Evaporation Resulting in Convective Flow Cooling Verified by Experimentation
(2018-04)The temperature of a gaseous convective stream can be reduced by injecting a colder liquid into the stream. The extent to which this gas temperature can be reduced depends on the amount of liquid being injected into the ... -
Numerical investigations of tip clearance flow characteristics of a pumpjet propulsor
(2018)In this study, numerical investigations of the tip clearance flow characteristics of a pumpjet propulsor based on Computational Fluid Dynamics (CFD) method have been presented. The Zwart-Gerber-Belamri (Z-G-B) cavitation ... -
Numerical investigations on the formation of tropical storm debby during NAMMA-06
(2010-06)Mesoscale model forecasts were carried out beginning at 0000 UTC 19 August for simulating Tropical Disturbance 4, which was named Tropical Storm Debby on 22 August 2006. The Weather Research and Forecasting model, with ... -
NUMERICAL METHODS FOR EIGENVALUE COMPUTATION OF FOURTH-ORDER SELF-ADJOINT ORDINARY DIFFERENTIAL OPERATORS
(2019-01)This dissertation is mainly concerned with three new and very different numerical methods for computing eigenvalues of fourth-order Sturm-Liouville differential operators on finite intervals with regular boundary conditions. ... -
Numerical Modeling of Phase Transition in Shock Tube Problem
(2019-12)In this work, we developed a numerical model for phase transition in shock-tube problem. This work focused on simulating shock-tube problem and the numerical framework is based on a two-phase flow model. Our simulation ... -
Numerical modeling of scattering type scanning near-field optical microscopy
(2013-09-20)Apertureless scattering-type Scanning Near-field Optical Microscopy (s-SNOM) has been used to study the electromagnetic response of infrared antennas below the diffraction limit. The ability to simultaneously resolve the ... -
Numerical modeling of soy biodiesel to maximize engine power and efficiency while minimizing pollutant emissions
(2016-07)Biodiesel is a renewable fuel that can help to reduce dependence on foreign petroleum and to help control the negative environmental effects of combustion engines. This work develops a numerical model for soy biodiesel ... -
A NUMERICAL SIMULATION of COSMIC-RAY MODULATION NEAR the HELIOPAUSE
(2015-07-20)Based on a hybrid galactic cosmic-ray transport model, which incorporated MHD global heliospheric data into Parker's cosmic-ray transport equation, we studied the behavior of the transport of galactic cosmic rays and the ... -
Numerical Simulation of Low Reynolds Number Locomotion in Viscoelastic Media
(2020-08)We use computational models to investigate 2D swimmers within various fluid media with low Reynolds Number. Extensions of the standard Immersed Boundary (IB) Method are proposed so that the fluid media may satisfy no slip, ... -
A numerical simulation of solar energetic particle dropouts during impulsive events
(2014-06-25)This paper investigates the conditions for producing rapid variations of solar energetic particle (SEP) intensity commonly known as "dropouts." In particular, we use numerical model simulations based on solving the focused ... -
Numerical simulation of the marine atmospheric boundary layer flow over the Cape Canaveral region and Gulf Stream using AVHRR SST - an atmospheric seabreeze model
(2000-12-22)An atmospheric mesoscale numerical model has been developed and applied to the marine atmospheric boundary layer (MABL) in the vicinity of sharp sea-surface temperature (SST) gradients. The Gulf Stream offshore ofEast ... -
Numerical simulation of tip clearance impact on a pumpjet propulsor
(2016-05)Numerical simulation based on the Reynolds Averaged NaviereStokes (RANS) Computational Fluid Dynamics (CFD) method had been carried out with the commercial code ANSYS CFX. The structured grid and SST k-ω turbulence model ... -
Numerical simulations of compact intracloud discharges as the Relativistic Runaway Electron Avalanche-Extensive Air Shower process
(2014-01-16)Compact intracloud discharges (CIDs) are sources of the powerful, often isolated radio pulses emitted by thunderstorms. The VLF-LF radio pulses are called narrow bipolar pulses (NBPs). It is still not clear how CIDs are ... -
Numerical Simulations of Comprehensive Hydrodynamic Performance of DARPA SUBOFF Submarine
(2019-12)A numerical study of the DARPA SUBOFF model using computational fluid dynamics (CFD) has been presented for developing a CFD application procedure to compute the hydrodynamic performance of underwater vehicles, including ... -
Numerical Study of Erosion of the Internal Wall of Sales Gas Piping by Black Powder Particles
(2016-12)Micro particles, primarily from iron, can wreak havoc on a Sales Gas System. For example, the transport of particles with the gas flow can cause erosion damage to the piping system, lead to the release of toxic gasses, ... -
A Numerical Study of Forbush Decreases with a 3D Cosmic-Ray Modulation Model Based on an SDE Approach
(2017-04-13)Based on the reduced diffusion mechanism for producing Forbush decreases (Fds) in the heliosphere, we constructed a three-dimensional (3D) diffusion barrier, and by incorporating it into a stochastic differential equation ... -
A Numerical Study of Jovian Moist Convection with a new Convective Adjustment Scheme, and Implications for Jupiter's Water Abundance
(2021-07)Jupiter’s atmosphere features a variety of clouds that are formed from the interplay of chemistry and atmospheric dynamics, from the deep red of the Great Red Spot to the high altitude white ammonia clouds present in the ... -
Numerical Study of the Effects of Injector Geometry on the Performance of Rotating Detonation Engines
(2022-07)A study of the impact of injector geometry on the performance of rotating detonation engines is performed. A numerical scheme is developed to represent the rotating detonation engine physics. In order to simulate the ... -
Numerical Study on Seakeeping Performance of Hydrofoil Assisted Submersible Trimaran (HAST)
(2019-03)The present study focuses on the seakeeping characteristics of Hydrofoil Assisted Submersible Trimaran (HAST). The seakeeping performance is an important part in ship design because it effects the comfort, control, ...