Research Papers

Computational Fluid Dynamics Simulation of a Mesoscale Combustor: An Exercise in Verification and Validation

[+] Author and Article Information
Jeffrey W. Weathers, James B. Weathers

 Northrop Grumman Corporation, 1000 St. Pe Hwy, Pascagoula, MS 39568

Robert P. Taylor

Department of Mechanical Engineering, The University of Alabama, Tuscaloosa, AL 35487

J. Thermal Sci. Eng. Appl 1(1), 011008 (Aug 05, 2009) (7 pages) doi:10.1115/1.3192771 History: Received May 07, 2009; Revised June 30, 2009; Published August 05, 2009

With the simulation of engineering processes via numerical methods on the rise comes the need for a quantitative measure of the agreement between computational results and experimental measurements. The use of quantitative methods in the comparison of the results of numerical and experimental analyses supersedes the traditional qualitative approach. In the present paper, the importance of the role of modeling assumptions in a verification and validation effort is illustrated through a mesoscale combustor example. The various types of uncertainties encountered in the experimentation and numerical simulation are investigated. Through the investigation the initial modeling assumptions proved to be insufficient, producing a comparison error outside of the acceptable range. Thus, the modeling assumptions were sequentially revised, minimizing the comparison error and producing a successful verification and validation effort.

Copyright © 2009 by American Society of Mechanical Engineers
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Figure 1

Mesoscale combustor (6)

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Figure 2

Mesoscale combustor schematic (6)

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Figure 3

Temperature data and measurement uncertainty (z=63 mm)(6)

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Figure 4

Schematic model (6)

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Figure 5

Framework for the VV process

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Figure 6

Portion of the grid refinement results

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Figure 7

Experimental and simulation results

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Figure 8

Comparison error and validation uncertainty

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Figure 9

Specific heat capacity

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Figure 10

Simulation results for revision 1

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Figure 11

Comparison error and validation uncertainty for revision 1

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Figure 12

Simulation results for revision 2

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Figure 13

Comparison error and validation uncertainty for revision 2



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