Announcing the

1st AIAA Ice Prediction Workshop

Workshop during the AIAA AVIATION 2021 Conference

Washington, D.C. USA
05-11 June 2021




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        The first workshop will focus on ice shape comparisons between the 3D/2D codes for cases where experimental ice shapes are readily available. The ice shapes would be generated on both 2D and 3D geometries for a limited number of configurations and conditions.

        The intent is to establish a sound baseline of the current capabilities and use this baseline to target the best topics for the follow-on workshops. This would maximize the number of participants that are potentially interested in such a workshop and minimize the risk of incomplete submissions.

        There is also strong interest in performing code-to-code comparisons of collection efficiency which is possible for all cases and code-to-experiment comparisons of collection efficiency where such data are available. It is recognized that a methodology for geometric comparison of ice shapes is also needed and should be a topic of the first workshop


General Information

        These Ice Prediction Workshops are collaborative in nature, aiming at assessing the icing simulation tools and practices, identify areas of improvement and recommended practices and at sharing knowledge. They should not, therefore, be viewed as competition between codes, groups and/or testing facilities.

        Ice accretion is, in most cases, a 3D phenomenon and, therefore, 3D modeling and simulation is usually preferred.

        Great effort has been invested in the research, development, and testing of 2D icing simulation. 2D analysis is still widely used and well accepted. It established the groundwork for 3D methods and, hence, it should be used as a valid reference for comparison whenever applicable.

        It is important to define a methodology to compare the simulated 3D ice shapes among themselves and with the 3D experimental ice shapes.

        Icing simulation typically involves four modules: airflow solver, droplet dynamics solver, surface water mass and energy balance module, and ice accretion geometry module. It is important, to try to understand how each module contributes to discrepancies in the final ice shape prediction.

        When comparing numerical simulation results to experimental simulation results, the uncertainty of both types of simulations needs to be considered, as well as the repeatability of the experimental results at a given facility and, if possible, between facilities.

        Our intent is to capture best practices in icing simulation, identify current limitations of the 3D tools, and make recommendations about specific areas where more work is needed.


Test Cases


CADs & Meshes (coming soon)



        Q4/2019 Q2/2020: Kick-off, scope of work, work groups.

        10/2020: Definition of test cases.

        11/2020: Send out open call for participation.

        03/2021: Participants complete simulations.

        04/2021 Participant submit results so that volunteers can begin results comparisons

        05/2021: Volunteers provide initial results comparisons

        05/2021: Develop workshop agenda

        05/2021: Prepare Organizing Committee presentation for the Workshop

        06/2021: Workshop during the AIAA AVIATION 2021 Conference in Washington D.C.


Organizing Committee


        Workshop: Andy Broeren

        Website: Richard Hann


Last Updated: 30 October 2020