High‐fidelity, predictive fluid flow simulations of the interactions between the rising thermal plumes from forced air warming blower and the ultra‐clean ventilation air in an operating room (OR) are conducted to explore whether this complex flow can impact the dispersion of squames to the surgical site. A large‐eddy simulation, accurately capturing the spatiotemporal evolution of the flow in 3 dimensions together with the trajectories of squames, is performed for a realistic OR consisting of an operating table (OT), side tables, surgical lamps, medical staff, and a patient. Two cases are studied with blower‐off and blower‐on together with Lagrangian trajectories of 3 million squames initially placed on the floor surrounding the OT. The large‐eddy simulation results show that with the blower‐off, squames are quickly transported by the ventilation air away from the table and towards the exit grilles. In contrast, with the hot air blower turned on, the ventilation airflow above and below the OT is disrupted significantly. The rising thermal plumes from the hot air blower drag the squames above the OT and the side tables and then they are advected downwards toward the surgical site by the ventilation air from the ceiling. Temporal history of the number of squames reaching 4 imaginary boxes surrounding the side tables, the OT, and the patient's knee shows that several particles reach these boxes for the blower‐on case.

中文翻译：

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热气毯对手术室中鳞片扩散的影响。

进行了逼真，可预测的流体流动模拟，对来自强制空气加热鼓风机的上升热羽流与手术室（OR）中的超净通风空气之间的相互作用进行了模拟，以探讨这种复杂的流动是否会影响鳞片的扩散。手术部位。进行大涡模拟，以精确地捕获3维流的时空演变以及鳞状轨迹，是针对现实的OR组成的，包括手术台（OT），边桌，手术灯，医护人员和患者。研究了两种情况，分别用送风和送风以及拉格朗日轨迹（最初放置在旧约》周围300万平方尺的拉格朗日轨迹）进行研究。大涡模拟结果表明，使用鼓风机，通风空气迅速将鳞片从桌子上运走，并朝着出口格栅移动。相反，在打开热风机的情况下，OT上方和下方的通风气流会明显中断。来自热空气鼓风机的上升的热羽流将鳞片拖到OT和侧桌上方，然后通过天花板的通风空气向下朝手术部位平移。到达围绕边桌，OT和患者膝盖的4个假想盒子的鳞片数量的时间历史记录表明，有一些颗粒到达鼓风机箱的这些盒子。来自热空气鼓风机的上升的热羽流将鳞片拖到OT和侧桌上方，然后通过天花板的通风空气向下朝手术部位平移。到达围绕边桌，OT和患者膝盖的4个假想盒的鳞片数量的时间历史记录表明，有一些颗粒到达鼓风机箱的这些盒中。来自热空气鼓风机的上升的热羽流将鳞片拖到OT和侧桌上方，然后通过天花板的通风空气向下朝手术部位平移。到达围绕边桌，OT和患者膝盖的4个假想盒子的鳞片数量的时间历史记录表明，有一些颗粒到达鼓风机箱的这些盒子。