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Mathematical modeling of separated t...

Carrara, Mark David.

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Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation./
Author:	Carrara, Mark David.
Description:	304 p.
Notes:	Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6697.
Contained By:	Dissertation Abstracts International66-12B.
Subject:	Applied Mechanics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3203920
ISBN:	9780542497278

Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation.
Carrara, Mark David.

Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation. - 304 p.

Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6697.

Thesis (Ph.D.)--State University of New York at Buffalo, 2006.

The overall objective of this dissertation is the development of a modeling and simulation approach for turbulent two-phase chemically reacting flows. A new full velocity-scalar filtered mass density function (FMDF) formulation for large eddy simulation (LES) of a separated two-phase flow is developed. In this formulation several terms require modeling that include important conditionally averaged phase-coupling terms (PCT). To close the PCT a new derivation of the local instantaneous two-phase equations is presented and important identities are derived relating the PCT to surface averages. The formulation is then applied for two particle laden flow cases and solved using a full particle based Monte-Carlo numerical solution procedure. The first case is a temporally developing counter-current mixing layer dilutely seeded with evaporating water droplets. Validation studies reveal excellent agreement of the full particle method to previous hybrid FDF studies and direct numerical simulations for single-phase flows. One-way coupled simulations reveal that the overall dispersion is maximized with unity Stokes number droplets. Two-way coupled simulations reveal the advantages of two FDF approaches where the subgrid variation of droplet properties are explicitly taken into account. Comparisons of the fully-coupled FDF approach are compared to more approximate means of determining phase-coupling based on filtered properties and local and compounded global errors are assessed. The second case considered is the combustion aluminum particles. A new mechanistic model for the ignition and combustion of aluminum particulate is developed that accounts for unsteady heating, melting, heterogeneous surface reactions (HSR) and quasi-steady burning. Results of this model agree well with experimental data for overall burn rates and ignition times. Two-phase simulations of aluminum particulate seeded mixing layer reveal the variations in flame radius resulting in local extinguishment from SGS variations in gas oxidizer.

ISBN: 9780542497278Subjects--Topical Terms:

1018410
Applied Mechanics.

Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation.
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100 1 $a Carrara, Mark David. $3 1923219
245 1 0 $a Mathematical modeling of separated two-phase turbulent reactive flows using a filtered mass density function approach for large eddy simulation.
300 $a 304 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-12, Section: B, page: 6697.
500 $a Adviser: Paul E. DesJardin.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2006.
520 $a The overall objective of this dissertation is the development of a modeling and simulation approach for turbulent two-phase chemically reacting flows. A new full velocity-scalar filtered mass density function (FMDF) formulation for large eddy simulation (LES) of a separated two-phase flow is developed. In this formulation several terms require modeling that include important conditionally averaged phase-coupling terms (PCT). To close the PCT a new derivation of the local instantaneous two-phase equations is presented and important identities are derived relating the PCT to surface averages. The formulation is then applied for two particle laden flow cases and solved using a full particle based Monte-Carlo numerical solution procedure. The first case is a temporally developing counter-current mixing layer dilutely seeded with evaporating water droplets. Validation studies reveal excellent agreement of the full particle method to previous hybrid FDF studies and direct numerical simulations for single-phase flows. One-way coupled simulations reveal that the overall dispersion is maximized with unity Stokes number droplets. Two-way coupled simulations reveal the advantages of two FDF approaches where the subgrid variation of droplet properties are explicitly taken into account. Comparisons of the fully-coupled FDF approach are compared to more approximate means of determining phase-coupling based on filtered properties and local and compounded global errors are assessed. The second case considered is the combustion aluminum particles. A new mechanistic model for the ignition and combustion of aluminum particulate is developed that accounts for unsteady heating, melting, heterogeneous surface reactions (HSR) and quasi-steady burning. Results of this model agree well with experimental data for overall burn rates and ignition times. Two-phase simulations of aluminum particulate seeded mixing layer reveal the variations in flame radius resulting in local extinguishment from SGS variations in gas oxidizer.
590 $a School code: 0656.
650 4 $a Applied Mechanics. $3 1018410
650 4 $a Engineering, Mechanical. $3 783786
650 4 $a Physics, Fluid and Plasma. $3 1018402
690 $a 0346
690 $a 0548
690 $a 0759
710 2 0 $a State University of New York at Buffalo. $3 1017814
773 0 $t Dissertation Abstracts International $g 66-12B.
790 1 0 $a DesJardin, Paul E., $e advisor
790 $a 0656
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3203920