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You searched for subject:(parabolic flow model). Showing records 1 – 3 of 3 total matches.

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University of Canterbury

1. Spearpoint, M.J. Modeling lifted methane jet fires using the boundary-layer equations.

Degree: Civil Engineering., 2006, University of Canterbury

The focus of this article is turbulent lifted jet fires. The main objective is to present a lifted jet fire methodology using the boundary-layer equations as a basis. The advantages of this are that finite-volume, mesh-independent predictions of the mean flow fields can be calculated on readily available computer resources, which leads to rigorous model calibration. A number of lift-off models are evaluated. The model of choice is one based on the laminar flamelet quenching concept combined with a model for the large-scale strain rate.

Subjects/Keywords: lifted jet fires; parabolic flow model; flamelet quenching; strain rate modelling; combustion; Fields of Research::290000 Engineering and Technology::290500 Mechanical and Industrial Engineering::290502 Industrial engineering

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APA (6th Edition):

Spearpoint, M. J. (2006). Modeling lifted methane jet fires using the boundary-layer equations. (Thesis). University of Canterbury. Retrieved from http://hdl.handle.net/10092/107

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Spearpoint, M J. “Modeling lifted methane jet fires using the boundary-layer equations.” 2006. Thesis, University of Canterbury. Accessed September 17, 2019. http://hdl.handle.net/10092/107.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Spearpoint, M J. “Modeling lifted methane jet fires using the boundary-layer equations.” 2006. Web. 17 Sep 2019.

Vancouver:

Spearpoint MJ. Modeling lifted methane jet fires using the boundary-layer equations. [Internet] [Thesis]. University of Canterbury; 2006. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10092/107.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Spearpoint MJ. Modeling lifted methane jet fires using the boundary-layer equations. [Thesis]. University of Canterbury; 2006. Available from: http://hdl.handle.net/10092/107

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

2. Ratnakar, Ram. Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media.

Degree: Chemical and Biomolecular Engineering, Department of, 2012, University of Houston

In the first part, a systematic procedure of multi-scale averaging, based on Lyapunov-Schmidt (L-S) technique of bifurcation theory, is presented where low-dimensional models are derived for two problems: dispersion of a non-reacting tracer in laminar flow in a tube (Taylor dispersion); and, diffusion, convection and reaction in a catalytic monolith with porous washcoat. The averaged model for Taylor dispersion developed by the L-S procedure is exact for general inlet/initial conditions including point sources. It predicts no centroid displacement or variance deficit as other models in the literature. Truncated hyperbolic models are also presented along with inlet/initial conditions to the same accuracy. The reduced order model developed for catalytic monoliths is presented in terms of three concentration modes and it is shown for time-varying inlet conditions, the interfacial flux depends on all three modes. In such cases, in contrast to the traditional two-phase model, the three-mode reduced order model retains the feature of the detailed model. In the second part, modeling and simulation of reactive dissolution of carbonates with in-situ gelling acids is presented. Stimulation of oil-wells in carbonate-reservoirs using an acidic-solution is a common practice to enhance oil production. However, due to heterogeneity, acid flows preferentially in high-permeability zones, which results into under stimulation of low-perm regions. Therefore, in-situ gelling acids are used that block the high-permeability region by forming a gel and diverts more acid to the low-permeability zones. Here, a rheological model for in-situ gelling acids is developed and combined with an extended two-scale-continuum model to describe the transport and reaction of in-situ gelling acids in carbonates. Three-dimensional simulations predict dissolution patterns in various flow regimes that are in accordance with experimental results. The effect of rheological parameters on flow diversion, optimum injection rates, wormhole diameter and gel front-width and speed is studied using scaling analysis. Finally, guidelines for optimal stimulation of carbonates with in-situ gelling acids are presented. Advisors/Committee Members: Balakotaiah, Vemuri (advisor), Luss, Dan (committee member), Economou, Demetre J. (committee member), Mohanty, Kishore K. (committee member), Nasr-El-Din, Hisham A. (committee member).

Subjects/Keywords: Multi-scale Averaging; Lyapunov-Schmidt Technique; Low-dimenional Model; Diffusion; Dispersion; Convection; Reaction; Mathematical Modeling; Laminar Flow; Monoliths; Transfer Coefficients; Hyperbolic Models; Parabolic Models; Multimode Models; Regularizat

Model . . . . . . . . . . . . . . . . . . . . 256 9.3.2 Flow Diversion in non-Reacting Case… …monolith with porous washcoat. The averaged model for Taylor dispersion developed by the L-S… …order model developed for catalytic monoliths is presented in terms of three concentration… …three modes. In such cases, in contrast to the traditional two-phase model, the three-mode… …reduced order model retains the feature of the detailed model. In the second part, modeling and… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Ratnakar, R. (2012). Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media. (Thesis). University of Houston. Retrieved from http://hdl.handle.net/10657/ETD-UH-2012-05-442

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Ratnakar, Ram. “Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media.” 2012. Thesis, University of Houston. Accessed September 17, 2019. http://hdl.handle.net/10657/ETD-UH-2012-05-442.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Ratnakar, Ram. “Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media.” 2012. Web. 17 Sep 2019.

Vancouver:

Ratnakar R. Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media. [Internet] [Thesis]. University of Houston; 2012. [cited 2019 Sep 17]. Available from: http://hdl.handle.net/10657/ETD-UH-2012-05-442.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Ratnakar R. Multi-scale Averaging and Analysis of Transport and Reaction Phenomena in Porous Media. [Thesis]. University of Houston; 2012. Available from: http://hdl.handle.net/10657/ETD-UH-2012-05-442

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation


Louisiana State University

3. Call, Jay Michael. Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics.

Degree: PhD, Physical Sciences and Mathematics, 2010, Louisiana State University

While it is possible to numerically evolve the relativistic fluid equations using any chosen coordinate mesh, typically there are distinct computational advantages associated with different types of candidate grids. For example, astrophysical flows that are governed by rotation tend to give rise to advection variables that are naturally conserved when a cylindrical mesh is used. On the other hand, Cartesian-like coordinates afford a more straightforward implementation of adaptive mesh refinement (AMR) and avoid the appearance of coordinate singularities. Here it is shown that it should be possible to reap the benefits associated with multiple types of coordinate systems simultaneously in numerical simulations. This could be accomplished by implementing a hybrid numerical scheme: one that evolves a set of state variables adapted to one particular set of coordinates on a mesh defined by an alternative type of coordinate system. A formalism (a generalization of the much-used Valencia formulation) that will aid in the implementation of such a hybrid scheme is provided. It is further suggested that a preferred approach to modeling astrophysical flows that are dominated by rotation may involve the evolution of inertial-frame cylindrical momenta (i.e., radial momentum, angular momentum, and vertical momentum) and the Jacobi energy—all on a corotating Cartesian coordinate grid.

Subjects/Keywords: matched filtering; PPM; piecewise parabolic method; flux reconstruction; AMR; adaptive mesh refinement; frame of reference; Coriolis force; centrifugal force; inertial force; symmetry; physics mining; LIGO; simulation; numerical model; metric; timestep; time update; Runge-Kutta; generalized advection variable; state variable; grid geometry; toy model; Flower code; primitive variable; generalized Valencia formulation; continuity equation; momentum equation; energy equation; hybrid; physical source; standard source; Euler equation; TOV star; control volume; 3-velocity; 4-velocity; normal; orthogonal; gravitational waves; ADM; source; weighted linear combination; field equation; characteristic vector; flow-complementing vector; vanishing vector; quasi-Killing vector; Killing vector; coordinate basis vector; pressure gradient; naked pressure term; generalized conservative variable; flux; conservative

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Call, J. M. (2010). Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics. (Doctoral Dissertation). Louisiana State University. Retrieved from etd-07052010-224427 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3073

Chicago Manual of Style (16th Edition):

Call, Jay Michael. “Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics.” 2010. Doctoral Dissertation, Louisiana State University. Accessed September 17, 2019. etd-07052010-224427 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3073.

MLA Handbook (7th Edition):

Call, Jay Michael. “Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics.” 2010. Web. 17 Sep 2019.

Vancouver:

Call JM. Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics. [Internet] [Doctoral dissertation]. Louisiana State University; 2010. [cited 2019 Sep 17]. Available from: etd-07052010-224427 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3073.

Council of Science Editors:

Call JM. Generalized curvilinear advection formalism for finite volume codes doing relativistic hydrodynamics. [Doctoral Dissertation]. Louisiana State University; 2010. Available from: etd-07052010-224427 ; https://digitalcommons.lsu.edu/gradschool_dissertations/3073

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