in order to determine the stability of underwater robots, their governing differential equations of motion in vertical and horizontal planes should be investigated. for horizontal plane stability, using routh stability criterion, four hydrodynamic coefficients, including derivatives of the lateral force and vertical moment with respect to sway and angular velocity are required. these coefficien...

We prove rigorous inequalities for the hydrodynamic translational friction and mobility matrices z and mO of an arbitrarily shaped rigid particle in terms of the electrostatic capacitance C of a conducting particle of identical shape. Specifically, we derive the scalar and matrix inequalities 1 3 tr z −1ø 1 3 tr mOøC −1 and 2 3z −1øC −1 I, where all quantities are normalized by the correspondin...

A new method for studying the interaction between an elastic object and a fluid has been developed. The fluid phase including solid interface is solved by our immersed solid method of body-force type. In the present study, the fluid-solid interaction force is incorporated into the finite-element method. This process is done by a superposition of the hydrodynamic force field with the solid inter...

Waldmann's work on forces on small particles suspended in a nonhomogeneous monatomic gas is extended to a polyatomic gas of rotating molecules. Under the assumption that the coefficient of diffuse reflection is equal to 1, the force the gas exerts on a particle is calculated from an expansion of the distribution function. In general, this force consists of three contributions which are determin...

Common carp Cyprinus carpio L. were reared a constant temperature of 20 degrees C from the larval (7 mm total length) to the juvenile (80 mm) stage. Body morphology and white muscle mass distribution were measured. Fast-start escape responses were recorded using high-speed cinematography from which the velocities, accelerations and hydrodynamic power requirements were estimated. All three measu...

The effects of hydrodynamic pressure processing (HDP) on marination and meat quality characteristics of turkey breasts were investigated. Breast muscles from 45 turkey hens were removed from the carcasses within 30 min postmortem. From each bird, the breast from one side was treated with HDP and the other side served as a nontreated control. Breasts were then marinated in either 15 or 30% brine...

A series of experiments was carried out using a dual sensor conductance probe to measure the local axial oil velocity distribution and the local oil volume fraction distribution in vertical, oil in water bubbly flows in an 80mm diameter vertical pipe. Values of the water superficial velocity were in the range 0.276 1 ms to 0.417 1 ms , values of the oil superficial velocity were in the range 0....

Past study of interspecific variation in the swimming speed of fishes has focused on internal physiological mechanisms that may limit the ability of locomotor muscle to generate power. In this paper, we approach the question of why some fishes are able to swim faster than others from a hydrodynamic perspective, using the technique of digital particle image velocimetry which allows measurement o...

The mechanical force-induced activation of the adhesive protein von Willebrand factor (VWF), which experiences high hydrodynamic forces, is essential in initiating platelet adhesion. The importance of the mechanical force-induced functional change is manifested in the multimeric VWF's crucial role in blood coagulation, when high fluid shear stress activates plasma VWF (PVWF) multimers to bind p...