The problem of cross-infection between patients and surgeons in the operating room had been widely concerned by the international community. The purpose of this study had been to explore the potential of a Dual-loop Different Velocity Air Curtain System (DDVACS) being applied in the operating room to reduce cross-infection. In this study, the performance of the system was studied using the computational fluid dynamics (CFD) numerical simulation method, with the operating conditions of different air supply velocities inside and outside being set. The RNG k-ε model, Discrete Phase Model (DPM), and Species Transport model were used to simulate the air distribution, particle diffusion, and virus diffusion. The main research results showed that, when the DDVACS was operated at an inner air supply velocity of 0.24 m/s and an outer air supply velocity of 0.45 m/s, the virus concentration in the surgical area had decreased by 89 %, the particulate matter concentration in the surgical area had decreased by 78.08 %, but the deposition of particulate matter had increased by 21.62 %. This study concluded that DDVACS had been found to effectively reduce the concentration of cross-infection. Finally, the velocity difference between the inner and outer sides was controlled within 2 times. This setting had been arranged to make the DDVACS work better. This study's contribution was to further verify the application of the DDVACS in operating rooms, providing a new perspective and empirical support for related fields and possessing certain practical application value.

中文翻译：

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手术室内双回路异速风幕系统的数值模拟


手术室患者与外科医生的交叉感染问题一直受到国际社会的广泛关注。本研究的目的是探索在手术室中应用双环不同速度风幕系统 （DDVACS） 以减少交叉感染的潜力。在本研究中，使用计算流体动力学 （CFD） 数值模拟方法研究了系统的性能，并设置了内部和外部不同供气速度的运行条件。RNG k-ε 模型、离散相模型 （DPM） 和物种传递模型用于模拟空气分布、颗粒扩散和病毒扩散。主要研究结果表明，当DDVACS以0.24 m/s的内送风速度和0.45 m/s的外送风速度运行时，手术区域病毒浓度下降了89 %，手术区域颗粒物浓度下降了78.08 %，但颗粒物沉积增加了21.62 %。本研究得出结论，已发现 DDVACS 可有效降低交叉感染的浓度。最后，将内外侧的速度差控制在 2 次以内。此设置旨在使 DDVACS 更好地工作。本研究有助于进一步验证 DDVACS 在手术室中的应用，为相关领域提供新的视角和实证支持，具有一定的实际应用价值。