The AIAA Code Verification Project - Test cases for CFD Code Verification

2010 ◽  
Author(s):  
Urmila Ghia ◽  
Sami Bayyuk ◽  
Sami Habchi ◽  
Chris Roy ◽  
Tom Shih ◽  
...  
Keyword(s):  
Test Cases ◽  
Code Verification

Workshop on Verification and Validation of CFD for Offshore Flows

2012 ◽  
Author(s):  
L. Eça ◽  
G. Vaz
Keyword(s):  
Reynolds Numbers ◽  
Verification And Validation ◽  
Test Cases ◽  
Code Verification ◽  
Complex Flow ◽  
Solution Verification ◽  
Manufactured Solution ◽  
Cylinder Flow ◽  
Flow Case ◽  
Paper Submission

This document introduces the Workshop on Verification and Validation (V&V) of CFD for Offshore Flows, to be held during OMAE2012. It presents a brief introduction to the purpose of Verification and Validation with the identification of the goals of code and solution verification and validation. Within this context, three test-cases are proposed: Case-I of code verification, Case-II of solution verification and Case-III of solution verification and validation. Case-I consists on a 3D manufactured solution of an unsteady turbulent flow. Case-II is an exercise on the canonical problem of the infinite smooth circular cylinder flow at different Reynolds numbers. Case-III is a more complex flow around a straked-riser. The participants are asked to perform at least one of these test-cases. The objectives for the three proposed test-cases are presented, together with a detailed description of the numerical settings to be used, and the results to be obtained and sent to the Workshop organization. At the end some considerations on general conditions, paper submission, deadlines, and encouragements are stated.

scholarly journals A validation and code-to-code verification of FAST for a megawatt-scale wind turbine with aeroelastically tailored blades

2017 ◽  
Vol 2 (2) ◽  
pp. 443-468 ◽  
Author(s):  
Srinivas Guntur ◽  
Jason Jonkman ◽  
Ryan Sievers ◽  
Michael A. Sprague ◽  
Scott Schreck ◽  
...  
Keyword(s):  
Wind Turbine ◽  
Department Of Energy ◽  
Test Cases ◽  
Experimental Measurements ◽  
International Electrotechnical Commission ◽  
Code Verification ◽  
Power Spectral ◽  
Power Spectral Densities ◽  
Good Agreement ◽  
Model Based Analysis

Abstract. This paper presents validation and code-to-code verification of the latest version of the U.S. Department of Energy, National Renewable Energy Laboratory wind turbine aeroelastic engineering simulation tool, FAST v8. A set of 1141 test cases, for which experimental data from a Siemens 2.3 MW machine have been made available and were in accordance with the International Electrotechnical Commission 61400-13 guidelines, were identified. These conditions were simulated using FAST as well as the Siemens in-house aeroelastic code, BHawC. This paper presents a detailed analysis comparing results from FAST with those from BHawC as well as experimental measurements, using statistics including the means and the standard deviations along with the power spectral densities of select turbine parameters and loads. Results indicate good agreement among the predictions using FAST, BHawC, and experimental measurements. These agreements are discussed in detail in this paper, along with some comments regarding the differences seen in these comparisons relative to the inherent uncertainties in such a model-based analysis.

Code Verification, Solution Verification and Validation in RANS Solvers

2010 ◽  
Author(s):  
Lui´s Ec¸a ◽  
Guilherme Vaz ◽  
Martin Hoekstra
Keyword(s):  
Turbulent Flows ◽  
Verification And Validation ◽  
Test Cases ◽  
Simple Test ◽  
Error Evaluation ◽  
Code Verification ◽  
Engineering Activity ◽  
Solution Verification ◽  
The Right ◽  
Comparison With Experimental Data

The maturing of CFD codes for practical calculations of complex turbulent flows implies the need to establish the credibility of the results by Verification & Validation. These two activities have different goals: Verification is a purely mathematical exercise that intends to show that we are “solving the equations right”, whereas Validation is a science/engineering activity that intends to show that we are “solving the right equations”. Verification is in fact composed of two different activities: Code Verification and Solution Verification. Code Verification intends to verify that a given code solves correctly the equations of the model that it contains by error evaluation. On the other hand, Solution Verification intends to estimate the error of a given calculation, for which in general the exact solution is not known. Validation intends to estimate modelling errors by comparison with experimental data. The paper gives an overview of procedures for Code Verification, Solution Verification and Validation. Examples of the three types of exercises are presented for simple test cases demonstrating the advantages of performing Verification and Validation exercises.

scholarly journals A Validation and Code-to-Code Verification of FAST for a Megawatt-ScaleWind Turbine with Aeroelastically Tailored Blades

2017 ◽  
Author(s):  
Srinivas Guntur ◽  
Jason Jonkman ◽  
Ryan Sievers ◽  
Michael A. Sprague ◽  
Scott Schreck ◽  
...  
Keyword(s):  
Department Of Energy ◽  
Test Cases ◽  
Experimental Measurements ◽  
International Electrotechnical Commission ◽  
National Renewable Energy Laboratory ◽  
Code Verification ◽  
Power Spectral ◽  
Power Spectral Densities ◽  
Good Agreement ◽  
Model Based Analysis

Abstract. This paper presents validation and code-to-code verification of the latest version of the U.S. Department of Energy, National Renewable Energy Laboratory wind turbine aeroelastic engineering simulation tool, FAST v8. A set of 1,141 test cases, for which experimental data from a Siemens 2.3 MW machine have been made available and were in accordance with the International Electrotechnical Commission 61400-13 guidelines, were identified. These conditions were simulated using FAST as well as the Siemens in-house aeroelastic code, BHawC. This paper presents a detailed analysis comparing results from FAST with those from BHawC as well as experimental measurements, using statistics including the means and the standard deviations along with the power spectral densities of select turbine parameters and loads. Results indicate a good agreement among the predictions using FAST, BHawC, and experimental measurements. These agreements are discussed in detail in this paper, along with some comments regarding the differences seen in these comparisons relative to the inherent uncertainties in such a model-based analysis.

Linear Visco-Resistive Computations of Magnetohydrodynamic Waves: I. The Code and Test Cases

1994 ◽  
Vol 144 ◽  
pp. 503-505
Author(s):  
R. Erdélyi ◽  
M. Goossens ◽  
S. Poedts
Keyword(s):  
Resonant Absorption ◽  
Numerical Code ◽  
Mhd Waves ◽  
Test Cases ◽  
Numerical Accuracy ◽  
Element Discretization ◽  
Flux Tubes ◽  
Magnetohydrodynamic Waves ◽  
Viscosity Coefficients ◽  
Magnetic Flux Tubes

AbstractThe stationary state of resonant absorption of linear, MHD waves in cylindrical magnetic flux tubes is studied in viscous, compressible MHD with a numerical code using finite element discretization. The full viscosity tensor with the five viscosity coefficients as given by Braginskii is included in the analysis. Our computations reproduce the absorption rates obtained by Lou in scalar viscous MHD and Goossens and Poedts in resistive MHD, which guarantee the numerical accuracy of the tensorial viscous MHD code.

Application of Backside Photo and Thermal Emission Microscopy Techniques to Advanced Memory Devices

1997 ◽  
Author(s):  
S.-S. Lee ◽  
J.-S. Seo ◽  
N.-S. Cho ◽  
S. Daniel
Keyword(s):  
Thermal Emission ◽  
Test Cases ◽  
Memory Devices ◽  
Front Side ◽  
Emission Analysis ◽  
Intensity Attenuation ◽  
Analysis Techniques ◽  
Defect Sites ◽  
Emission Microscopy ◽  
Microscopy Techniques

Abstract Both photo- and thermal emission analysis techniques are used from the backside of the die colocate defect sites. The technique is important in that process and package technologies have made front-side analysis difficult or impossible. Several test cases are documented. Intensity attenuation through the bulk of the silicon does not compromise the usefulness of the technique in most cases.

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