Flow and air-entrainment around partially submerged vertical cylinders
TypeArticles dans des revues avec comité de lecture
In this study, a partially submerged vertical cylinder is moved at constant velocity through water, which is initially at rest. During the motion, the wake behind the cylinder induces free-surface deformation. Eleven cylinders, with diameters from D=1.4 to 16 cm, were tested under two different conditions: (i) constant immersed height h and (ii) constant h/D. The range of translation velocities and diameters are in the regime of turbulent wake with experiments carried out for 4500<Re<240000 and 0.2<Fr<2.4, where Re and Fr are the Reynolds and Froude numbers based on D. The focus here is on drag-force measurements and relatively strong free-surface deformation up to air-entrainment. Specifically, two modes of air-entraiment have been uncovered: (i) in the cavity along the cylinder wall and (ii) in the wake of the cylinder. A scaling for the critical velocity for air-entrainment in the cavity has been observed in agreement with a simple model. Furthermore, for Fr>1.2, the drag force varies linearly with Fr.
Files in this item
Showing items related by title, author, creator and subject.
AGEORGES, Valentin; PEIXINHO, Jorge; PERRET, Gaële (American Physical Society, 2019)In this study, a partially submerged vertical cylinder is moved at constant velocity through water, which is initially at rest. During the motion, the wake behind the cylinder induces free-surface deformation. Eleven ...
PINGULKAR, Hrishikesh; PEIXINHO, Jorge; CRUMEYROLLE, Olivier (American Physical Society, 2020)The stretching of viscoelastic polymer solutions close to breakup can create attached drops on a filament, whose properties and dynamics are little understood. The stretching of capillary bridges and the consecutive filament, ...
VITTAL SHENOY, Dhanush; SHADLOO, M. S.; PEIXINHO, Jorge; HADJADJ, Abdellah (Emerald Publishing, 2019)Purpose: Fluid flows in pipes whose cross-sectional area are increasing in the stream-wise direction are prone to separation of the recirculation region. This paper aims to investigate such fluid flow in expansion pipe ...
Augmented Reality Head-Up-Display for Advanced Driver Assistance System: A Driving Simulation Study HALIT, Lynda; KEMENY, Andras; GARBAYA, Samir; MERIENNE, Frédéric; MICHELIN, Sylvain; ALBAUT, Valentin (AHFE International, 2014)Research and technological advance in the field of Augmented Reality (AR) is growing rapidly (Mas, 2011). One of the new application domains is the automobile industry, linked to the necessary men machine aspects of Advanced ...
LÉON, Jean-Claude; DUPEUX, Thomas; CHARDONNET, Jean-Rémy; PERRET, Jérôme (ASME, 2016)The simulation of grasping operations in virtual reality (VR) is required for many applications, especially in the domain of industrial product design, but it is very difficult to achieve without any haptic feedback. Force ...