An experimental investigation was conducted to assess the effectiveness of a suction flow control method for vortex-induced vibration (VIV) suppression. The flow control method uses a limited number of isolated suction holes to manipulate the vortex shedding in the wake behind a circular cylinder in order to reduce the unsteadiness of the dynamic wind loads acting on the cylinder. The experimen...

The kurtosis statistic is introduced as a sensitive tool for efficient preliminary analysis of flowinduced vibration response data. The kurtosis of sequential blocks of time series data allows one to distinguish single mode lock-in events. The problem of predicting lock-in is then discussed. Instructional examples are introduced to illustrate the relative importance of flow-speed, power-in leng...

This study presents an advanced numerical prediction model based on nonlinear wake oscillators for the investigation of multidirectional vortex-induced vibration (VIV) responses a long catenary riser depending structural curved configuration versus incoming flow direction. By considering uniform free-stream aligned with initial curvature plane in convex or concave shape, normal velocity compone...

High precision is necessary during percutaneous transcatheter heart valve implantation. The precision of the implantation has been established by increasing the heart rate (usually to 200 beats per minute) to the point of significantly reduced cardiac output and thus minimizing valve movement. Routinely, this tachycardia is induced by rapid pacing. Here we report a case of failure to pace durin...

By GIANLUCA BURCHI, GARY R. BAUCHAN, CHARLES MURPHY and MARK S. ROH* Consiglio per la Ricerca e la Sperimentazione in Agricoltura, CRA-VIV Landscaping Plants and Nursery Research Unit, Via dei Fiori 8, 51012 Pescia (PT), Italy USDA, ARS, Electron and Confocal Microscope Unit, Soybean Genomics and Improvement Laboratory, B-012, 10300 Baltimore Ave., Beltsville, MD 20705-2350, USA USDA, ARS, USNA...

A new polyoxovanadate [Zn2(dien)3][[Zn(dien)]2As4V16O42(H2O)] x 3H2O (1, dien = diethylenetriamine) has been hydrothermally synthesized and structurally characterized by EA, IR, TGA, magnetic measurement and single crystal X-ray diffraction. X-Ray diffraction analyses reveal that 1 exhibits the first [As4V16O42(H2O)]-containing polyoxometalate. In 1, the adjacent [As4V16O42(H2O)] clusters are l...

Abstract In offshore engineering, the phenomenon of free span often occurs, and pipeline may have multiple spans adjacent to each other, forming a multi-span pipeline. The interaction different makes structural vibration characteristics more complex, which change fatigue affect safety structure. this paper, model tests were designed explore vortex-induced (VIV) pipelines investigate mechanism. ...

Small wind energy harvesting converts aeroelastic vibration into electricity and can provide independent power supplies for low-power-consumption sensors, which are not convenient replacing chemical batteries frequently. As harvesters collect sustainable from the ambient environment, they environmentally friendly saving. The most widely adopted wind-induced mechanisms designing vortex-induced (...