Understanding how fluid flow interacts with micro-textured surfaces is crucial for a broad range of key biological processes and engineering applications including particle dispersion, pathogenic infections, and drag manipulation by surface topology. We use high-speed digital holographic microscopy (DHM) in combination with a correlation based de-noising algorithm to overcome the optical interf...

Among the different lateral force resisting systems, shear walls are of appropriate stiffness and hence are extensively employed in the design of high-rise structures. The architectural concerns regarding the safety of these structures have further widened the application of coupled shear walls. The present study investigated the optimal dimensional design of coupled shear walls based on the im...

Introduction: Time-resolved (CINE) phase contrast (PC) MRI allows measurement of time resolved threedirectional velocities within entire 3D vascular structures [1, 2]. The information contained in the PC data is not limited to volumetric flow, but also includes derived quantities such as wall shear stress (WSS), the viscous drag of blood on the arterial wall, which is believed to play a key rol...

The excess pore water pressure generated under the combined vertical and horizontal earthquake excitations is generally greater than that unidirectional excitation, which may further affect dynamic response of soil-pile-superstructure-quay wall (SPSQ) system. This study conducted a coupled effective-stress analysis for SPSQ system to liquefaction-induced lateral displacement excitations. To acc...

Background 4D PCMR has the potential to help in understanding the direct relationship between fluid and structure interaction within the cardiovascular system, to allow for 3D visualization of blood flow patterns in the heart, and to make direct wall shear stress measurements. However, the wide dynamic range of velocities in the left ventricle (LV, range of 0-200 cm/s) can create difficulties w...

Background: The interaction between the blood and the vessel wall is of great clinical interest in studying cardiovascular diseases, the major causes of death in developed countries.Objective: To understand the effects of incorporating fluid-structure interaction into the simulation of blood flow through an anatomically realistic model of abdominal aorta and renal arteries reconstructed from CT...

This study presents the shear performance and the modes of failure of reinforced concrete (RC) beams strengthened with externally bonded carbon fiber reinforced polymer (CFRP) wraps. The experimental program consisted of testing twenty-seven, full-scale, RC beams. The variables investigated in this research study included steel stirrups (i.e., beams with and without steel stirrups), shear span-...

The fluctuating wall shear stress, wall pressure, and streamwise velocity were measured simultaneously in a cylindrical boundary layer at a momentum thickness Reynolds number of Reu52160 and a boundary layer thickness to cylinder radius ratio of d/a55 using a hot wire wall shear stress probe mounted just upstream of a hearing aid microphone and a hot wire velocity probe. Variable Interval Time ...

Self-centering rocking walls are known as viable alternatives to typical shear walls, as they provide a number of solutions for eliminating seismic flaws of conventional designs. These rocking walls have a generally positive impact on the seismic behavior of structural systems, but their design makes them susceptible to concrete crushing around their base, which can lead to significantly advers...