Collaborative Research: HCC: Medium: Aerodynamic Virtual Human Simulation on Face, Body, and Crowd

该项目开发了第一个高保真空气动力学虚拟人体模型，以支持科学界并解决各种新出现的公共卫生问题。拟议的合作研究解决了与动态虚拟人体系统建模和仿真相关的重大和众多计算挑战，涉及空气动力学流动过程和各种物理组件（例如，面部，头发，衣服，人群和热环境）。这里的重点是模拟人体的空气动力学微环境及其与人体呼吸活动的相互作用，这在很大程度上被虚拟人体文献所忽视。研究目标是：(1)模拟人脸边界附近由薄层气流构成的气动微环境；(2)模拟人体部位的接触、摩擦和固体-空气耦合，包括皮肤、头发和衣服表面；(3)开发多物理场和多智能体仿真的气动人群数值建模算法。在这些目标中，将开发可微数值求解器，以促进人类呼吸相关问题的优化和计算设计。提出的算法将引入一个新的基于第一性原理的计算工具家族，以填补以前被忽视的虚拟人体建模的空气动力学子区域在仿真，动画，设计和教育方面的空白。pi还将以开源软件库和模拟结果数据库的形式传播结果。如果成功，这些空气动力学感知的虚拟人体模型的可用性，通过可微分物理模拟器，个性化数据模型，交互式可视化和VR/AR显示的集成增强，可以为涉及人体形态的各种应用提供方便和直观的工具。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

This project develops the first high-fidelity aerodynamic virtual human model to support the scientific community and to tackle various emerging public-health problems. The proposed collaborative research addresses the significant and numerous computational challenges associated with the modeling and simulation of dynamic virtual human systems, involving aerodynamic flow processes and various physical components (e.g., face, hair, clothes, crowd, and thermal environments). The specific focus here is on modeling the human's aerodynamic micro-environment and its interactions with human respiratory activities, which have largely been neglected in the virtual human literature. The research aims are: (1) model the aerodynamic microenvironment consisting of thin layers of airflow near the boundary of human face; (2) simulate contact, friction, and solid-air coupling with areas of the human body, including skin, hair, and clothing surfaces; and (3) develop numerical algorithms to model aerodynamic crowds for multi-physics and multi-agent simulation. Among these aims, differentiable numerical solvers will be developed to facilitate optimization and computational design for human respiration-related problems.The proposed algorithms will introduce a new family of computational tools based on first principles to fill the gaps in simulation, animation, design, and education regarding the previously ignored aerodynamic subarea of virtual human modeling. The PIs will also disseminate the results as open-source software libraries and databases of simulation results. If successful, the availability of these aerodynamics-aware virtual human models, augmented by an ensemble of differentiable physics simulators, individualized data models, interactive visualization, and VR/AR display, can provide convenient and intuitive tools for various applications that involve the human form.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.