You are encouraged to use these tests as starting points when exploring features in these products. Geometries, material properties, loads, and output results can easily be changed and the solution repeated. As a result, the tests offer a quick introduction to new features with which you may be unfamiliar.

The test cases in this manual are primarily intended for verification of the ANSYS programs. An attempt has been made to include most significant analysis capabilities of the ANSYS products in this manual. Although they are valuable as demonstration problems, the test cases are not presented as step-by-step examples with lengthy data input instructions and printouts. The reader should refer to the online help for complete input data instructions.

Users desiring more detailed instructions for solving problems or in-depth treatment of specific topics should refer to the Ansys Fluent, Ansys CFX, or the Ansys Forte documentation. Tutorials are also available for various specific topics. These publications focus on particular features or program areas, supplementing other ANSYS reference documents with theory, procedures, guidelines, examples, and references.

The test cases in this manual have been modeled to give reasonably accurate comparisons with experimental data wherever applicable, with a low number of elements and iterations. In some cases, even fewer elements and/or iterations will still yield an acceptable accuracy for the purpose of verifying the solution. The test cases employ a balance between accuracy and solution time. An attempt has been made to present a test case and results that are grid-independent. If test results are not grid-independent, it is due to the need to limit the run time for the test to be in the manual. Improved results can be obtained in some cases by refining the mesh, but this requires longer solution times.

The ANSYS solutions in this manual are compared with solutions or experimental data from textbooks or technical publications. Fluid-dynamics simulations have to make use of data available from experimental measurements for their verification primarily because closed-form theoretical solutions are not available for modeling the related phenomena. In this manual, test cases make use of experimental data published in reputable journals or conference proceedings for verification of the computational results. The experimental measurements for fluid-flow systems are often presented in the form of plots of the relevant parameters. The published experimental data for those cases and the corresponding simulation results are presented in graphical format to ease comparison.

Different computers and operating systems may yield slightly different results for some of the test cases in this manual due to numerical precision variation from machine to machine. Solutions that are nonlinear, iterative, or have convergence options activated are among the most likely to exhibit machine-dependent numerical differences. Because of this, an effort has been made to report an appropriate and consistent number of significant digits in both the target and the ANSYS solution. If you run these test cases on your own computer hardware, be advised that an ANSYS result reported in this manual as 0.01234 may very well show up in your printout as 0.012335271. Slightly different results may be obtained when different processor types or operating systems are used.

The goal for the test cases contained in this manual was to have results accuracy within 3% of the target solution. The solutions for the test cases have been verified; however, certain differences may exist with regard to the references. These differences have been examined and are considered acceptable.

It should be noted that only those items corresponding to the given theoretical solution values are reported for each problem. The same solution may also contain other useful numerical solution data.

The test cases provided in this manual are a single instance, using one mesh, one turbulence model, and one scenario for the model. They are not validation cases of the models presented since they do not provide, nor attempt to provide, the necessary methodology on how to arrive at the presented results. The intent of these cases is to provide a means to verify that you are obtaining the same results in your computing environment as ANSYS obtained in its computing environment. You are encouraged to do a complete study to validate the ANSYS solution.

For customers who may have further need for formal verification of the ANSYS products on their computers, Ansys, Inc. offers the Quality Assurance Testing Agreement. You are provided with input data, output data, comparator software, and software tools for automating the testing and reporting process. If you are interested in contracting for such services, contact the Ansys, Inc. Quality Assurance Group.

For additional information, refer to the Ansys Quality Assurance Effort in the Ansys Workbench Verification Manual.

All project files for the test cases are available for download at the Customer Portal. Ansys publishes these files annually for each product release. You can find the zipped archives at: ANSYS Customer Portal > Downloads > Current Release > Tools, or you can use the download links below.

Project File Release Schedule

The latest verification files become available for download several weeks after each release of the Ansys software.

If you click the download link for the latest project files, you might receive a message that the files are not yet available. If that happens, check back again later. Meanwhile, you can download the project files for the previous release at any time. (You'll find the download link below as well.) The download package for the previous release contains project files for all the test cases, except for the most recent ones added for the current release. And those earlier files are fully compatible with the latest version of your Ansys software.

How to Download the Fluids Verification Case Files

Due to differences between the Fluent and CFX solvers, only a subset of the test cases in this manual are supported by CFX. The following is a list of test cases which are supported by CFX:

Dimensionality Column Key:

VMFL001	2
VMFL002	A						X
VMFL003	A		X
VMFL004	2
VMFL005	A
VMFL006	A								X
VMFL007	A
VMFL008	A													X
VMFL009	2						X						X
VMFL010	2
VMFL011	2
VMFL012	2		X
VMFL013	2		X				X
VMFL014	A		X						X
VMFL015	3		X
VMFL016	3		X
VMFL017	2		X			X	X
VMFL018	2		X			X	X
VMFL019	2	X
VMFL020	2	X					X							X
VMFL021	A		X								X	X
VMFL022	A		X								X	X
VMFL023	2	X
VMFL024	A	X									X		X
VMFL025	A		X				X		X	X
VMFL026	3	X			X	X	X
VMFL027	2		X
VMFL028	A		X				X
VMFL029	2				X		X
VMFL030	3		X
VMFL031	2		X
VMFL032	A		X
VMFL033	2						X
VMFL034	2		X								X
VMFL035	3		X			X	X							X
VMFL036	A		X
VMFL037	2		X
VMFL038	2	X											X
VMFL039	A		X				X				X	X	X
VMFL040	A		X
VMFL041	2		X			X	X
VMFL042	2		X								X		X
VMFL043	2		X	X
VMFL044	A		X			X	X
VMFL045	2					X	X
VMFL046	2				X	X	X
VMFL047	2		X
VMFL048	3		X
VMFL049	A		X				X		X	X
VMFL050	2	X					X
VMFL051	2				X	X	X
VMFL052	2		X										X
VMFL053	2		X			X	X
VMFL054	2
VMFL055	2		X	X									X
VMFL056	2						X	X
VMFL057	2						X	X
VMFL058	A		X
VMFL059	2						X
VMFL060	2		X	X		X	X
VMFL061	2						X	X
VMFL062	2		X
VMFL063	2
VMFL064	2
VMFL065	A		X
VMFL066	2						X	X
VMFL067	A		X				X				X
VMFL068	3		X
VMFL069	3				X						X
VMFL070	2						X	X
VMFL071	2		X				X
VMFL072	3				X
VMFL073	A		X
VMFL074	2		X								X
VMFL075	2				X	X	X
VMFL076	2				X		X
VMFL077	3		X								X
VMFL078	3				X

The following is a list of test cases which are supported by Ansys Fluent GPU Solver: