Numerical simulation of the effect of waves on cavity dynamics for oblique water entry of a cylinder

2020 ◽  
Vol 32 (6) ◽  
pp. 1178-1190
Author(s):  
Gui-yong Zhang ◽  
Zhao Hou ◽  
Tie-zhi Sun ◽  
Hai-peng Wei ◽  
Ning Li ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Water Entry

Modeling and numerical simulation of the forces acting on a sphere during early-water entry

2014 ◽  
Vol 76 ◽  
pp. 1-9 ◽  
Author(s):  
John Abraham ◽  
John Gorman ◽  
Franco Reseghetti ◽  
Ephraim Sparrow ◽  
John Stark ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Water Entry

scholarly journals A brief compendium of water entry results derived from laboratory tests of various types of wall assemblies

2019 ◽  
Vol 282 ◽  
pp. 02050
Author(s):  
Michael A. Lacasse ◽  
Nathan Van Den Bossche ◽  
Stephanie Van Linden ◽  
Travis V. Moore
Keyword(s):  
Numerical Simulation ◽  
Performance Evaluation ◽  
Laboratory Tests ◽  
Moisture Transfer ◽  
Control Design ◽  
Water Entry ◽  
Building Envelope ◽  
Test Results ◽  
Different Types ◽  
Wood Frame

There is an increase in the use of hygrothermal models to complete the performance evaluation of walls assemblies, either in respect to design of new assembles or the retrofit of existing wall assemblies. To this end there are guides available in which is provided information on moisture loads to wall assemblies. This includes, for example, Criteria for Moisture-Control Design Analysis in Buildings given in ASHRAE 160, Assessment of moisture transfer by numerical simulation provided in EN 15026, and NRC’s “Guidelines for Design for Durability of the Building Envelope”. The designer of a new assembly or evaluator of an existing wall is tasked with having to determine what moisture loads to apply to the wall and where to apply this load within the assembly. Typically there is little or no information that is readily available regarding moisture loads to walls and thus the suggested hourly moisture load, as given in ASHRAE 160, is 1% by weight of the total driving rain load to the wall (i.e. kg/m2-hr). In this paper, a brief compendium of water entry test results derived from laboratory tests of various types of wall assemblies is provided from which estimates of moisture loads to different types of wall can be developed. Water entry test results are given of wood frame walls typically used in housing, but also metal-glass curtain walls and other commercial wall assemblies, where possible, in terms of driving loads to the wall.

A comparative study on the behaviour of free-fall lifeboat launching from a skid and from a hook

2000 ◽  
Vol 214 (2) ◽  
pp. 359-370 ◽  
Author(s):  
M Reaz H Khondoker ◽  
M Arai
Keyword(s):  
Numerical Simulation ◽  
Dynamic Response ◽  
Comparative Study ◽  
Impact Force ◽  
Free Fall ◽  
Water Entry ◽  
Hydrodynamic Forces ◽  
Response Criteria ◽  
Risk Of Injury ◽  
Tremendous Impact

There are two commonly used launching methods of free-fall lifeboats: from a skid and from a hook. A free-fall lifeboat, whether it is released from a skid or from a hook, experiences tremendous impact when it enters the water. This impact force, together with other hydrostatic and hydrodynamic forces and moments, affects the motions and accelerations of the boat considerably. In this paper, a comparative study on the behaviours of the skid and hook launching of free-fall lifeboats has been presented. Numerical simulation for different launching methods has been used as a tool to obtain trajectories of the lifeboat for different launching conditions. Also polar diagrams of accelerations are drawn using the data computed for the same conditions. Dynamic response criteria have been used in order to evaluate the risk of injury to the occupants during water entry of the lifeboat.

Three dimensional numerical simulation of water entry problem

2015 ◽  
Author(s):  
Andrea Luigi Facci ◽  
Marcelo Reggio ◽  
Stefano Ubertini
Keyword(s):  
Numerical Simulation ◽  
Three Dimensional ◽  
Water Entry

scholarly journals NUMERICAL SIMULATION OF THE OBLIQUE WATER ENTRY OF WEDGES WITH VORTEX SHEDDING

Brodogradnja ◽  
2018 ◽  
Vol 69 (4) ◽  
pp. 69-83
Author(s):  
Xiaobin Yang ◽  
◽  
Guodong Xu
Keyword(s):  
Numerical Simulation ◽  
Vortex Shedding ◽  
Water Entry
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