使用原位适配器的无创成像辅助4D多模态流体流动CFD模拟
Non-invasive imaging assisted CFD simulation of 4D multi-modal fluid flow using In-situ adaptor
AI总结：
本文提出可置于工业X射线CT内的原位紧凑适配器，结合CT/EIT与ANSYS构建4D多相流CFD环境，验证EIT可替代CT辅助并共享数据。
摘要：
X射线计算机断层扫描（CT）用于恢复流体通道的真实表面，并输入模拟工具（ANSYS）以创建准确的数字环境。该模拟工具还接收CT辅助的多相流体剖面（属于流动即将开始前的实例）作为初始条件。这一独特方法之所以能够实现，是因为采用了一种新型原位紧凑型适配器设计；该设计用于构建可放置在任何工业X射线CT内部的流体通道，并实现上述目标。它与一款基于Android的应用程序集成，以便在放入CT后控制流动。其便携且足够紧凑：（a）可放置在各种实验环境中，并且（b）具有充分的模块化，可同时搭载多模态系统。两个关键参数，即（a）空间分布和（b）空气体积分数，通过两种不同的无创成像模态测量：（a）电阻抗断层扫描（EIT）和（d）X射线计算机断层扫描（CT）。模拟结果与来自EIT和X射线CT的实验结果相关联，分别显示出85%至98%的一致性。EIT获得的时间平均导电流体流动剖面与X射线CT获得的质量衰减流体剖面相匹配，证明了原位适配器的实用性。用于CFD研究的CT辅助可由EIT辅助替代，因为前者技术：（a）扫描时间可能相对慢于后者，（b）EIT不需要旋转，（c）经济，并且（d）流体通道不必放置在屏蔽舱内部，从而提高了实用性。本工作共享了分析数据。多模态无创成像提供多相流信息，它还能在共同截面上区分导电和质量衰减的多相剖面。
英文摘要：
X-ray Computed Tomography (CT) is used to recover the true surfaces of fluid channels and fed to simulation tool (ANSYS) to create accurate cyber environment. The simulation tool also receives CT-assisted multiphase fluid profiles (belonging to the instance just before the flow starts) as an initial condition. This unique methodology is made possible by using a novel in-situ compact adaptor design is used to create fluid channels that can be placed inside any industrial X-ray CT and fulfill the above objective. It is integrated with an android based App to control the flow once placed inside CT. It is portable and compact enough: (a) to be placed inside various experimental environments, and (b) modular enough to be mounted with multi-modal systems simultaneously. Two key parameters, (a) spatial distribution and (b) the air volume fraction, are measured using two different non-invasive imaging modalities: (a) Electrical Impedance Tomography (EIT) and (d) X-ray Computed Tomography (CT). Simulated outcomes are correlated with the experimental outcomes from both EIT and X-ray CT, showing an agreement of 85 to 98 percent, respectively. Time-averaged electrically conductive fluid flow profile obtained by EIT shows a match with mass mass-attenuated fluid profile obtained by X-ray CT, justifying the utility of an in-situ adaptor. CT assistance for CFD studies can be replaced by EIT assistance as former techniques: (a) scanning time may be relatively slower than the latter, (b) it does not require rotations, (c) economical, and (d) fluid channels need not be placed inside of shielded compartment thus improving practicality. The data of analysis is shared in this work. Multimodal non-invasive imaging provides multiphase flow information, it also differentiates conductive, and mass-attenuated multiphase profiles at common cross-sections.
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