Noncoalescence in the Oblique Collision of Fluid Jets

The oblique collision between the northeastern margin of the Arabian platform and the Iranian microcontinent has led to transpressional deformation in the Zagros orogenic belt in the central part of the Alpine–Himalayan orogenic belt. Although previous articles have emphasized the dextral sense of shear in the Zagros orogenic belt, in this paper, using several indicators of kinematic shear sense upon field checking and microscopic thin-section studies, evidence of the development of a sinistral top-to-the NW deformation belt is presented. The mean attitudes of the foliations and lineations in this belt are 318°/55°NE and 19°/113°, respectively.

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Iterative Solution for Ideal Fluid Jets

Journal of Hydraulic Engineering ◽

10.1061/(asce)hy.1943-7900.0000740 ◽

2013 ◽

Vol 139 (8) ◽

pp. 905-910 ◽

Cited By ~ 4

Author(s):

Oscar Castro-Orgaz

Keyword(s):

Ideal Fluid ◽

Iterative Solution ◽

Fluid Jets

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Ideal fluid jets

International Journal of Engineering Science ◽

10.1016/0020-7225(68)90053-0 ◽

1968 ◽

Vol 6 (6) ◽

pp. 317-328 ◽

Cited By ~ 17

Author(s):

A.E. Green ◽

N. Laws

Keyword(s):

Ideal Fluid ◽

Fluid Jets

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Atomization patterns produced by the oblique collision of two Newtonian liquid jets

Physics of Fluids ◽

10.1063/1.3373513 ◽

2010 ◽

Vol 22 (4) ◽

pp. 042101 ◽

Cited By ~ 24

Author(s):

Stephen D. Hoath ◽

Graham D. Martin ◽

Ian M. Hutchings

Keyword(s):

Newtonian Liquid ◽

Liquid Jets ◽

Oblique Collision

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Peculiarities of the Power Hydrocannon Operation

Recent Advances in Mechanics of Solids and Structures ◽

10.1115/imece2003-42788 ◽

2003 ◽

Author(s):

G. A. Atanov ◽

A. N. Semco ◽

O. P. Petrenko ◽

E. S. Geskin ◽

V. Samardzic ◽

...

Keyword(s):

High Speed ◽

Numerical Technique ◽

Design Parameters ◽

Jet Formation ◽

Pressure Fields ◽

Fluid Jets

The paper is concerned with improvement of the devices for formation of super high-speed fluid jets termed hydro cannon. Two modes of the energy injection into the fluid (the piston impact and the powder explosion) are considered and advantages of the use of the gunpowder are determined. A numerical technique for prediction of the jet formation, developed previously by one of the authors is applied for description of the velocity and pressure fields within the hydro cannon. Effect of the design parameters on the fluid acceleration is explored and suggestions for improvement of the hydro cannon design are made.

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Thrust Enhancement From Radial Velocity in Squid Inspired Thrusters

Volume 5: Ocean Engineering; CFD and VIV ◽

10.1115/omae2012-83976 ◽

2012 ◽

Author(s):

Michael Krieg ◽

Kamran Mohseni

Keyword(s):

Radial Velocity ◽

Driving Mechanism ◽

Low Thrust ◽

Vortex Ring Formation ◽

Total Impulse ◽

Fluid Jets ◽

Force Range ◽

And Control ◽

Thrust Production ◽

Control Surfaces

Squid and jellyfish generate propulsive forces by successively taking in and expelling high momentum jets of water. This method of propulsion offers several advantages to underwater vehicles/robots. The driving mechanism can be placed internal to the vehicle, reducing the drag associated with an abundance of external thrusters and control surfaces. The thrusters can generate accurate predictable forcing in the low thrust range, while still generating thrust nearly instantaneously over the entire force range. Vortex ring formation dynamics play an important role in creating thrust. It is observed that squid and jellyfish eject fluid jets which are not exactly parallel, and have a contracting velocity in the radial direction. A prototype thruster was developed which generates both parallel and converging propulsive jets. The total impulse of the jet is determined from DPIV techniques to determine the effect a non-zero radial velocity had on thrust production. The radial velocity was observed to increase the total impulse of the jet by 70% for low stroke ratio jets, and 75% for large stroke ratio jets.

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