article published yes Nobuyuki Umetani author Bernd Bickel author 49876194-F248-11E8-B48F-1D18A9856A870000-0001-6511-9385 BeBi department MATERIALIZABLE: Intelligent fabrication-oriented Computational Design and Modeling project We present a data-driven technique to instantly predict how fluid flows around various three-dimensional objects. Such simulation is useful for computational fabrication and engineering, but is usually computationally expensive since it requires solving the Navier-Stokes equation for many time steps. To accelerate the process, we propose a machine learning framework which predicts aerodynamic forces and velocity and pressure fields given a threedimensional shape input. Handling detailed free-form three-dimensional shapes in a data-driven framework is challenging because machine learning approaches usually require a consistent parametrization of input and output. We present a novel PolyCube maps-based parametrization that can be computed for three-dimensional shapes at interactive rates. This allows us to efficiently learn the nonlinear response of the flow using a Gaussian process regression. We demonstrate the effectiveness of our approach for the interactive design and optimization of a car body. https://research-explorer.ista.ac.at/download/4/5216/IST-2018-1049-v1+1_2018_sigg_Learning3DAerodynamics.pdf application/pdfno ACM2018 eng 00044818500005010.1145/3197517.3201325 374 https://ist.ac.at/en/news/new-interactive-machine-learning-tool-makes-car-designs-more-aerodynamic/ Umetani N, Bickel B. Learning three-dimensional flow for interactive aerodynamic design. <i>ACM Trans Graph</i>. 2018;37(4). doi:<a href="https://doi.org/10.1145/3197517.3201325">10.1145/3197517.3201325</a> Umetani N, Bickel B. 2018. Learning three-dimensional flow for interactive aerodynamic design. ACM Trans. Graph. 37(4), 89. Umetani, Nobuyuki, and Bernd Bickel. “Learning Three-Dimensional Flow for Interactive Aerodynamic Design.” <i>ACM Trans. Graph.</i> ACM, 2018. <a href="https://doi.org/10.1145/3197517.3201325">https://doi.org/10.1145/3197517.3201325</a>. N. Umetani, B. Bickel, ACM Trans. Graph. 37 (2018). Umetani, N., &#38; Bickel, B. (2018). Learning three-dimensional flow for interactive aerodynamic design. <i>ACM Trans. Graph.</i> ACM. <a href="https://doi.org/10.1145/3197517.3201325">https://doi.org/10.1145/3197517.3201325</a> N. Umetani and B. Bickel, “Learning three-dimensional flow for interactive aerodynamic design,” <i>ACM Trans. Graph.</i>, vol. 37, no. 4. ACM, 2018. Umetani, Nobuyuki, and Bernd Bickel. “Learning Three-Dimensional Flow for Interactive Aerodynamic Design.” <i>ACM Trans. Graph.</i>, vol. 37, no. 4, 89, ACM, 2018, doi:<a href="https://doi.org/10.1145/3197517.3201325">10.1145/3197517.3201325</a>. 42018-12-11T11:44:06Z2025-04-14T07:28:55Z