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，以支持科学界和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系统的建模和仿真相关的重大和众多的计算挑战，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）。这里的具体重点是对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进行建模，这在很大程度上被虚拟人文献所忽视。研究目的是：（1）对由人脸边界附近的薄层气流组成的空气动力学微环境进行建模;（2）模拟与人体区域（包括皮肤、头发和衣服表面）的接触、摩擦和固气耦合;（3）开发数值算法来对空气动力学人群进行建模，以进行多物理场和多智能体仿真。在这些目标中，微分数值求解器将被开发，以促进优化和计算设计的人类呼吸相关的problems.The拟议的算法将引入一个新的家庭的计算工具的基础上的第一性原理，以填补空白，在模拟，动画，设计和教育有关以前被忽视的空气动力学分区的虚拟人体建模。研究所还将以开放源码软件库和模拟结果数据库的形式传播结果。如果成功的话，这些空气动力学感知的虚拟人体模型的可用性，通过可区分的物理模拟器，个性化的数据模型，交互式可视化和VR/AR显示的集合来增强，该奖项反映了NSF的法定使命，并通过使用基金会的智力价值进行评估，更广泛的影响审查标准。

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.