Abstract The accuracy of the prediction suppression efficiency triplex helical strakes for vortex-induced vibrations (VIV) is important in offshore industry risers. Towing tank tests 1:1 section model have been used study one degree freedom; however, this method requires a long time both preparation and testing. In study, scaled testing based on flume oscillating frame proposed, which measured ...

Flow around cylinders is widespread in marine engineering projects such as risers, pipelines, and tension leg. To understand the wake characteristics of circular cylinder with different roughness, at a Reynolds number 7400, circulation water tunnel used for experimental PIV measurements to compare among smooth cylinder, original grooved secondary cylinder. The results revealed that reduced reci...

We performed experiments to establish the scaling of convective heat transfer at the wall of circulating fluidized beds. In these units, the suspension condenses into clusters separated from the wall by a gas film of order the mean particle diameter. Because of the relatively high solid volume fraction and heat capacity of these clusters, Lints and Glicksman [AIChE Symp. Ser. 89 (1993), pp. 297...

the index vessel in over half of the cases. The original results from the OPTIMA trial likewise suggested that an immediate invasive treatment of NSTE-ACS patients is associated with a poorer 30-day outcome and conveys an increased rate of peri-procedural myocardial infarction [3]. Whereas the potential early detrimental effects of immediate intervention are likely to be attributed to increased...

In order to prevent the severe slugging flow regime in multiphase transport pipelines, active feedback control is the recommended solution. Instead of elaborated models such as CFD and OLGA models, a simple dynamical model with few state variables is required in a model-based control system. We propose a new simplified dynamical model for severe slugging flow in pipeline-riser systems. The prop...