The effect of the asymmetric water entry over a submerged part of a ship on the hydrodynamic impact is investigated numerically. A wedge body is considered to study and the problem is assumed to be two-dimensional. The Results of symmetric and asymmetric impacts are compared together. The effect is found significant in the numerical simulation. The maximum hydrodynamic pressure at a heel angle ...

This work numerically evaluates the role of advancing velocity on water entry rigid wedges, highlighting its influence development underpressure at fluid–structure interface, which can eventually lead to fluid detachment or cavity formation, depending geometry. A coupled FEM–SPH numerical model is implemented within LS-DYNA, and three types asymmetric impacts are treated: (I) symmetric wedges w...

development of a numerical model which describes launching of offshore jackets from barge is presented in this paper. in this model, in addition to capabilities of commercial softwares, water entry forces on jacket members and an implicit newmark solution technique are included. the results are in general agreement with other numerical software’s available (sacs). fluid forces acting on jacket ...

Area Editor: John H. Roberts Despite conventional wisdom that firm profits decrease with competitive entry, the empirical literaturefinds a number of situationswhere the entry of an equivalent-quality competitor into amarket led to higher profits for the incumbents. Our paper uses a standard linear Hotelling (1929)market to study how location choices affect the possibility that profits increase...

in this research, process asymmetric polyetherimide hollow fiber membranes using ethanol (0, 2 and 4 wt%) as non-solvent additive in the polymer dope via phase inversion method were fabricated. aqueous solution of 1-methyl-2-pyrrolidine (nmp) (90%) was applied as a bore fluid to avoid inner skin layer formation and water was used as the external coagulant. the morphology of fabricated membranes...

This paper presents a dynamic overset mesh based two-dimensional Numerical Wave Tank (NWT) model to study the water entry of wedge into waves in process offshore lowering. The NWT is developed by integrating an incompressible multiphase flow solver on and wave generation library OpenFOAM. results symmetric/asymmetric still are presented validate comparing with published data. A series numerical...

Different nose shape can cause a significant influence on the water entry trajectory and cavity. In order to study evolution characteristics of cavity asymmetric in process entry, based high-speed photography technology, low-speed comparative experiments were carried out for three different cut-angle types 35°, 40° 45° under angles. Through digital image processing contour motion attitude infor...