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 41 for “"PECLET NUMBER"”.
-
Motion and Heat Transfer of Droplets at Large Reynolds and Peclet Number
Made available in DSpace on 2014-12-09T17:13:38Z (GMT). No. of bitstreams: 1 6511895.pdf: 6148284 bytes, checksum: 43b21fc3dbd506eb0caab0b2a057c495 (MD5) Previous issue date: 1965
-
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.
-
Cold model of a vibrated-bed microreactor capable of varying Peclet number at fixed weight hourly space velocity providing a tool for simulating an important feature of the reaction kinetic scene in large catalytic fluid beds
… level of gas dispersion (characterized by axial Peclet number) at a fixed weight hourly space velocity (WHSV). A tool has thus been provided whereby an important feature (viz., gas dispersion) of the reaction kinetic scene in large catalytic fluid beds can be simulated on a microscale, using …
-
Numerical simulation of mixing in viscous-fingering displacements
… especially for advection-dominated flows (Peclet number Pe > 103). It is well known that when a less viscous fluid displaces a more viscous fluid, the displacement front is unstable and leads to the formation of a pattern known as viscous fingering. However, current simulation technology is …
-
Lattice Boltzmann Study of the Interstitial Hydrodynamics and Dispersion in Steady Inertial Flows in Large Randomly Packed Beds
… increase in the lateral dispersivity with Peclet number in complete agreement with experimental data. For longitudinal dispersion, disorder is shown to lead to a slightly superlinear increase in dispersivity with Peclet number in accordance with experimental findings.
-
The Convective Transport From Drops in an Electric Field
… results of such analyses, for both high and low Peclet number, to corresponding solutions for transport in an alternating electric field. The low Peclet number transport is investigated analytically using a regular and a composite, double perturbation expansion. A digital computer is employed to …
-
Computational methods for two-phase flow with soluble surfactant
… viscous surrounding fluid in the zero Reynold's number or Stokes flow limit. A surfactant that is present on the interface is also soluble in the exterior fluid, and the drop is deformed by an imposed linear flow. The geometry is two-dimensional and Cartesian. The dissolved surfactant is …
-
Radial Miscible Viscous Fingering of Icelandic Mantle Plume
… ratio (i.e. the ratio of fluid viscosities), Peclet number (i.e. the ratio of advective and diffusive transport rates) and thickness of the horizontal layer into which the fluid is injected, together control the presence of fi ngering due to the Saffman-Taylor instability. Estimates for the …
-
Mass transfer from spherical gas bubbles and liquid droplets moving through power-law fluids in the laminar flow regime
… and Tien stream functions allow the Sherwood number to be determined as a function of the Peclet number, power-law index, and a viscosity ratio parameter. The Hirose and Moo-Young relation is shown to be a limiting case of this solution. Mass transfer rates increase as the fluids become more …
-
Mass transfer with second-order chemical reaction inside circulating fluid droplets
… indices are presented as a function of the Peclet number, reaction number, diffusivity ratio, concentration ratio, and the dimensionless contact time. The results of this work are compared with the film and penetration theories for mass transfer with reaction as modified to apply inside a …
-
Point source dispersion in a direct numerical simulation of turbulent channel flow
… is developed and tested. Accurate estimates of a number of Lagrangian characteristics of the flow, necessary for the description of the diffusion process, are reported for the case of a point source in the center of the channel. The consequences of molecular diffusivity on the effectiveness of the …
-
The Flame Structure of AP /Htpb Sandwiches
… growth of the fuel-rich region with increasing Peclet number, predicted by the model, is qualitatively matched by the experimental results. The predicted shrinkage of the fuel-rich region when the binder layer is diluted with fine AP is also qualitatively matched by the experiments. Comparison …
-
The influence of geothermal sources on deep ocean temperature, salinity, and flow fields
… because of its dependence on two parameters: a Peclet number (the ratio of horizontal advection and vertical diffusion), and a Froude-number-like parameter (the ratio of long wave phase speed to background flow speed) which control the relative amount of damping and advection of different …
-
The influence of geothermal sources on deep ocean temperature, salinity, and flow fields
… because of its dependence on two parameters: a Peclet number (the ratio of horizontal advection and vertical diffusion), and a Froude-number-like parameter (the ratio of long wave phase speed to background flow speed) which control the relative amount of damping and advection of different …
-
Theoretical study of heat distribution and surface temperatures generated in oscillating contact
… which display the effect of velocity or Peclet number, the frequency and amplitude of oscillation, and thermal properties. Also, results showing the effect of the number, spacing and orientation of the contact patches are presented. Finally, theoretical calculations corresponding to …
-
Nonlinear interfacial stability of core-annular film flows in the presence of surfactants
… system, the length of the system and a surface Peclet number which measures the diffusion of surfactant on the interface. In order to gain an understanding of the dynamics, we carry out extensive computations using accurate and stable numerical methods capable of following the solution for long …
-
Influences of surfactant on the breakup of a fluid jet in viscous surrounding
… by another viscous fluid at low Reynolds number is studied both theoretically and experimentally. Equations governing the evolution of the interface and surfactant concentration are derived using a long wavelength approximation for the case of an inviscid jet and a slightly viscous jet …
-
Heat Transfer in Laminar Solid-Fluid Suspension Flow
… observed to be shear dependent when the particle Peclet numbers (defined by Pe(,d) (TBOND) ed('2)/(alpha)(,f), where e is the external shear rate, d the particle diameter, and (alpha)(,f) the thermal diffusivity of fluid) are high. Measured particle volume fractions were (phi) = 0.15 and 0.30 for …
-
Modeling and simulation of micro/nano-rod distribution in micro channel flows
… distribution of a nanorod in various range of Peclet number and position from the confining wall. Subsequently, the results of the angle distributions simulation were employed to generate a universal mathematical model for the particle orientation distribution, which our model of concentration …
Page 1 of 3