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 20 of 84 for “"Control-Volume"”.
-
Control volume unstructured mesh procedure for convection-diffusion solidification processes
… the unstructured mesh problem in finite volume (FV) or control volume (CV) method used in numerical simulations. The modelling work conducted is in context of solidification for casting processes. The control volume-unstructured mesh (CV-UM) method can be categorised into two approaches, …
-
On finite element and control volume upwinding methods for high Peclet number flows
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1994.
-
A control volume unstructured grid approach to the solution of the elastic stress-strain equations
… of elastic stress-strain equations based upon a control volume approach on unstructured meshes. The purpose is to integrate the solution of solid mechanics with that of fluid flow and heat transfer within the context of solidification problems in the casting of metals. The conventional way of …
-
A Study of the Reattachment of A Turbulent Supersonic Shear Layer With the Closure Condition Provided by A Control Volume Analysis
Made available in DSpace on 2014-12-10T22:48:13Z (GMT). No. of bitstreams: 1 7212174.pdf: 3024763 bytes, checksum: b687fff5d3e846bcd81a0beda969f446 (MD5) Previous issue date: 1971
-
Compressible Flow Analysis of Thrust Augmenting Ejectors
… in ejectors can be analyzed using either the control volume approach, or detailed models based on the Navier -Stokes Equations and the theory of turbulent jets. The control volume approach uses integrated forms of the conservation equations of mass, momentum and energy. It is chosen in the …
-
Entropy generation in fluid mixing
… that are captured in an overall manner by a control volume analysis. The two situations are parallel mixing flows in a duct and the evolution of a wake in a centrifugal compressor. Results are given for the evolution of the velocity profile and for the dissipation function and stagnation …
-
On the false-diffusion problem in the numerical modelling of convection-diffusion processes
… numerical discretisation scheme of the finite-volume type for solving steady-state differential equations for recirculating flows with and without sources. In an effort to evaluate the performance of the various numerical schemes available, some standard test cases were used. The relative …
-
Dynamic subdivided relative humidity model of a polymer electrolyte membrane fuel cell
The development of a control-oriented dynamic relative humidity model for a polymer electrolyte membrane (PEM) fuel cell stack is presented. This model is integrated with a first law based thermal model, which tracks energy flow within four defined control volumes in the fuel cell; the cathode …
-
Black Liquor Droplet Combustion and Modeling
… and overall continuity equations using the control volume method. The model uses the power-law scheme for combined advection diffusion, and the fully-implicit scheme for the time step. It predicts internal velocities, gas and solid temperatures (assumed equal), pressure, and composition. …
-
Entropy generation minimization of a heat and mass exchanger for use in a humidification-dehumidification desalination system
… of non-condensable gases are examined using control volume, scaling, and boundary layer techniques, with the aim of defining a criterion for minimum entropy generation rate that is useful in engineering analyses. This process is particularly relevant in humidification-dehumidification …
-
Shear Effects on Buoyancy-Generated Turbulence and Salt Fingers
… detected. Eddy diffusivities are estimated from control volume analysis and oceanographic microstructure methods.
-
Mixing processes and hydraulic control in a highly stratified estuary
… at the mouth during the late ebb using a control volume approach to isolate mean vertical entrainment processes from turbulent processes, and quantify the vertical turbulent salt and momentum fluxes. Observed turbulent dissipation rates are high, on the order of 10-3 m2s.3, with vertical …
-
Loss mechanisms in a highly loaded transonic axial turbine stage
… flow computations, complemented by simplistic control volume analyses as well as test data, provided results for establishing the quantitative level of loss from various sources. The test data has been acquired in a cascade and blowdown turbine research rig. Specifically, the overall loss …
-
Experimental determination of blade forces in a cross-flow turbine
… agree reasonably well with the results of a control volume analysis. Two figures are provided, by which the designer may determine the tangential and radial forces for any geometrically similar machine.
-
Development of an energy storage tank model
… considering the energy interactions on a small control volume. The general method of solving these equations is described as are other features of the simulation program. Two modeling applications are presented: the first using a hot water storage tank with a solar collector and an absorption …
-
Comparison of two methods for two dimensional unstructured mesh adaptation with elliptic smoothing
… grids is presented. The technique uses virtual control volumes that are iteratively manipulated to conform the mesh to match either a Riemannianmetric tensor field or an equal distribution of scalar weights. Forcing functions similar to those used for structured grids are employed such that the …
-
A model of pension portfolios with salary and surplus process
… pension plans, Journal of Economic Dynamics and Control, Volume 30, Issue 2006, Pages 843-877, with added details and background material in order to demonstrate the mathematical methods. In the investigation of the management of the investment portfolio, we only use one risky asset together with …
-
Experimental Validation of an Ejector Ramjet Solver at High Entrainment Conditions
… validation of a quasi-one-dimensional control volume ejector-ramjet solver was performed at various subsonic inlet flow conditions corresponding to high-entrainment ratios. An ejector apparatus was designed to replicate the intake of an ejector-ramjet currently under development. The …
-
A Lumped Computational Model for Sodium Sulfur Battery Analysis
… model designed to aid in the design process and control of sodium sulfur batteries.;To this end, a transient lumped computational model derived from an integral analysis of the transport of species, energy and charge throughout the battery has been developed. The computation processes are coupled …
Page 1 of 5