US-Egypt Cooperative Research: Experimental and Computational Investigation of Wall-Pressure Fluctuation in Shear Layers with Strong and Weak Feedback Effects

0242991Naguib描述：该奖项支持东兰辛密歇根州立大学（MSU）机械工程系Ahmed Naguib博士与埃及开罗艾因夏姆斯大学机械动力工程系Zakaria Ghoneim博士和Mostafa Abdelkhalek博士之间的联合研究项目。 他们计划在计算研究方面进行合作研究，并与NSF CTS 011690奖资助的实验工作相协调。研究的重点是了解壁面压力场的时空特性及其在两个不同但相关的流动问题上产生的流动来源。第一个问题与二维空腔上的不可压缩流动有关。最近，Ain Shams大学的合作者使用随机涡方法（RVM）计算了这种流动。实验研究的目的是验证现有的空腔流的计算。RVM程序将用于计算轴对称后向台阶（第二种情况）的流场和相关壁面压力。 这些计算将与现有奖项下进行的实验工作相协调。 预计在这里编译的时空数据库可用于调查其他流问题的主机。实例包括用于主动流动控制的基于壁压的低阶模型的开发，以及用于非平衡流动的湍流模型的测试。 由此产生的数据集将予以公布，并通过网络和会议传播，提供给广大流体动力学研究人员中的有关各方。适用范围：该项目将通过在与实验条件相似的条件下从计算中产生时间分辨、空间流和壁面压力信息来增强现有的NSF拨款。 拟议的工作是互利的，因为MSU获得了在实验研究项目中添加计算组件的深度，而Ain Shams大学获得了进行实验研究的能力，以补充正在进行的计算工作。 该项目将支持一名来自艾因夏姆斯大学的硕士生前往密歇根州立大学，在PI的监督下工作三个月，构建腔流设置和麦克风阵列传感器模块。该硬件稍后将在Ghoneim博士的监督下并与PI协调，在Ain Shams大学的风洞设施中进行测量。 该项目由国际科学和工程办公室以及化学和运输系统司共同资助。

0242991NaguibDescription: This award supports a joint research project between Dr. Ahmed Naguib, Department of Mechanical Engineering, Michigan State University (MSU), East Lansing, and Dr. Zakaria Ghoneim and Dr. Mostafa Abdelkhalek, Department of Mechanical Power Engineering, Ain Shams University, Cairo, Egypt. They plan to conduct collaborative research on computational investigation coordinated with experimental work funded by NSF award CTS 011690. The investigation will focus on understanding the space-time character of the wall-pressure field and its generating flow sources on two different but related flow problems. The first of these is associated with the incompressible flow over a two-dimensional cavity. This flow has been computed recently by the Ain Shams University collaborators using Random Vortex Methods(RVM). The experimental investigation is aimed at verifying the existing computation of the cavity flow. The RVM code will be adapted to compute the flow field and associated wall pressure for the (second case) flow over an axi-symmetric backward-facing step. These computations will be coordinated with the experimental work conducted under the existing award. It is expected that the space-time databases to be compiled here could be used to investigate a host of other flow issues. Examples include the development of wall-pressure-based low-order models for active flow control, and testing of turbulence models for non-equilibrium flows. The resulting data sets will be published and made accessible to interested parties in the wider community of fluid dynamics researchers through web and conference-based dissemination. Scope: This project will enhance the existing NSF grant by the generation of time-resolved, spatial flow and wall-pressure information from the computations at conditions similar to those of the experiment. The proposed work is mutually beneficial as MSU gains the depth of adding a computational component to an experimental research project and Ain Shams University gains capability to conduct an experimental investigation complementing ongoing computational work. The project will support the travel of a masters degree student from Ain Shams University to MSU for three months to work under the supervision of the PI on constructing a cavity-flow setup and microphone-array sensor module. This hardware will later be used to conduct measurements in a wind tunnel facility at Ain Shams University under the supervision of Dr. Ghoneim and in coordination with the PI. This project is jointly funded by the Office of International Science and Engineering and the Division of Chemical and Transport Systems.