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Challenge Problems

The ASME VVUQ 30 Subcommittee on Verification, Validation, and Uncertainty Quantification in Computational Nuclear System Thermal Fluids Behavior is supporting a series of benchmark problems designed to study the scope and key ingredients of the VVUQ 30 Subcommittee's charter. This will be achieved by means of the following:

Single-Jet Computational Fluid Dynamics (CFD) Numeric Model Validation Benchmark Problems

The Single-Jet Computational Fluid Dynamics (CFD) Numeric Model Validation benchmark problem was first introduced as Benchmark Problem #2 at the 2019 V&V Symposium and involves simulating a single-jet and plume for single-jet experiments at different Reynolds numbers. During the 2019 V&V Symposium and 2020 V&V Symposium, the focus was on isothermal single jets.

For the 2021 V&V Symposium, submissions for Benchmark Problem #2 were open for the heated (non-isothermal) single-jet experiment in addition to the isothermal single jet experiment.

Now, for the 2022 VVUQ Symposium, submissions are also open for Benchmark Problem #3, which involves a new heated (non-isothermal) single-jet experiment with conjugate heat transfer in a new facility.

Details for each benchmark problem are provided below. If you would like to participate in either benchmark problem at the 2022 V&V Symposium, please submit your technical presentation abstract for the Challenge Problem Workshops and Panel Sessions track by January 21, 2022.

If you have any questions and/or are interested in participating, please email the ASME VVUQ 30 Subcommittee Staff Engineer, Michelle Pagano, at

Benchmark Problem #3 (*NEW*): Single Non-Isothermal Jet within the Upper Plenum with Conjugate Heat Transfer
The Facility Description includes geometry and inlet conditions for the new facility. Participants are expected to perform modeling & simulation and submit results prior to seeing the experimental data.

Benchmark Problem #2 (CONTINUATION): Isothermal Single Jet Experiment and/or Non-Isothermal Single Jet Experiment within the Upper Plenum
The Thermal-Hydraulic Research Laboratory website includes the facility description (test geometry and boundary conditions), experimental data, and a technical publication.