Fish receive much of their sensory information — used, for example, to guide their stunning schooling behaviour — from a particular sensory organ system, the lateral line. Hair cells sitting in neuromast organs that are scattered along the flank of the fish sense water movements, much as hair cells in our inner ear sense air movements. The lateral line provides the fish with information about m...

Abstract The purpose of this work is the validation hydrodynamic resistance for a small fishing vessel providing more details about ship’s hydrodynamics. selected ship traditional that has been sailing in Argentina than 20 years without previous numerical evaluation. Because absence optimization, might be non-efficient from consumption, operating and polluting point view. For reason, order to b...

Computational modeling is a valuable complementary tool to assess behavior of bottom trawl fishing gears. A simplified model of the gear that mainly affects to the net is proposed. The model is constrained to steady towing conditions, flat seabed and gear symmetry. Simulations proportionate a number of relevant outcomes like distribution of tensions at the warp, balance of forces at the otterbo...

The prediction and control of vortex-induced vibration (VIV) is one the key problems for riser design. effect platform heave motion on VIV deep sea top-tensioned (TTR) presented by means numerical simulation experiment in this research. First, was modeled as a parametric excitation, governing equation considering excitation established. Then, dynamic response TTR calculated numerically finite d...

Abstract An alternative twin rudder system known as the Gate Rudder© has been applied to newbuild vessels and an existing ship with aim improve their hydrodynamic performance reduce greenhouse gas emissions. The consists of two asymmetric cross-sections L-shaped blades located either side a propeller. generate thrust (duct effect) from propeller ship-included flow. Initially, forces moments sin...

Fuel vapour composition and flammability properties of E85 A series of experiments have been conducted to study the flammability characteristics and determine the flammable temperature range of E85 fuel vapours. E85 is a mixture of ethanol and petrol the composition varies depending on time of the year. According to the Swedish standard, SS 155480:2006, the ethanol content may not be below 70 %...

RENEWED interest in ophthalmodynamometry during recent years has revealed difficulties in the actual technique which may be attributable, at least in part, to the dynamometer in common use, designed by Bailliart (1917). Many of these troubles have their origin in the lack of control over the instrument that is so frequently experienced. This is especially common when the operator is in the earl...

Dynamical relation between ship's motions and warp tension while towing a trawl net was identified by the use of statistical method to be the multivariate AR model. Using this system identification method, the various towing system parameters were obtained by analysing the records of measuring ship's motions and warp tension during the fishing operations in several sea conditions. Based on thes...