Showing papers on "Fluid parcel published in 1988"
01 May 1988
14 citations
TL;DR: In this article, a general theory on the interaction of solid body and vorticity-dilatation field is outlined, based on the momentum equation, and the theory consists of the generation of vortic and dilatation from solid surface and the reaction on solid body by the produced vortically-dilated field.
11 citations
TL;DR: In this article, a new laboratory technique is outlined by which allows the flow of a very viscous fluid can be made visible and finite strains and fluid rotations in the flow can be measured.
Abstract: A new laboratory technique is outlined by which the flow of a very viscous fluid can be made visible and finite strains and fluid rotations in the flow can be measured. The technique involves the emplacement of a pattern of grid lines in a plane through the fluid before the flow begins. The grid lines are in fact formed by placing an ‘‘unfixed’’ photocopy in contact with a surface of the fluid, thereby transferring carbon particles from the photocopying paper on to the fluid, and then bringing that surface of the fluid into contact with another similar volume of fluid. The carbon particles are therefore embedded within the working volume of fluid. Use of the technique, and some of the results that can be obtained, are demonstrated by the example of flow about a falling cylinder.
9 citations
5 citations
TL;DR: In this paper, the authors simulate the advection and diffusion of an inert air parcel in a flow generated by a planetary boundary layer model and measure the difference between the actual concentration distribution of the parcel and those resulting from two forms of trajectory models.
4 citations
01 May 1988
4 citations
TL;DR: A detailed review of four intensive events in the Western Atlantic Ocean Experiment (WATOX) in 1985 is given in this paper, where three air parcel trajectory models are used to assess the general flow characteristics associated with these events, and results show that all three models produce trajectories with similar source regions.
3 citations
25 Jul 1988
3 citations
Book•
15 Sep 1988
TL;DR: In this paper, the Momentum Equation for Steady Flow of an Inviscid Incompressible Fluid (MEFL) is used to measure the momentum of the flow of an ideal compressible fluid.
Abstract: Introduction - Fundamental Properties of a Real Fluid - Hydrostatic Pressure - One-dimensional Flow of an Ideal Incompressible Fluid - Flow Measurement - The Momentum Equation for Steady Flow of an Inviscid Incompressible Fluid - Flow in Pipes of Viscous Incompressible Fluids - Dimensional Analysis and Dynamical Similarity - Open Channel Flow - Viscous Flow - One Dimensional Flow of an Ideal Compressible Fluid - Specimen Exam Paper 1 - Specimen Exam Paper 2 - Recommended Reading - Index
2 citations
Patent•
15 Aug 1988
TL;DR: In this article, a fluid dynamic target of an elongated planar geometry having an airfoil shaped cross section disposed generally parallel to the direction of the fluid flow and extending into the fluid stream, which is supported by a rotating arrangement about an axis generally parallel with the lengthwise axis of the dynamic target, is presented.
Abstract: The flowmeter of the present invention comprises a fluid dynamic target of an elongated planar geometry having an airfoil shaped cross section disposed generally parallel to the direction of the fluid flow and extending into the fluid stream, which is supported in a rotating arrangement about an axis generally parallel to the lengthwise axis of the fluid dynamic target wherein the airfoil shaped cross section remains generally parallel to the direction of the fluid flow during the rotating movement of the fluid dynamic target, which rotating movement is biased by a mechanical spring or the Earth's gravitational force. The time rate of the fluid flow is determined from the angular displacement of the fluid dynamic target about the rotating axis, which angular displacement results from a combination of the lift and drag forces on the fluid dynamic target created by the fluid flow moving therearound.
01 Jan 1988
TL;DR: In this article, the authors give an overview of recent theoretical and computational results for streamline diffusion finite element methods applied to the incompressible Navier-Stokes equations with small viscosity and to some nonlinear hyperbolic conservation laws modelling compressible flow.
Abstract: We give an overview of some recent theoretical and computational results for streamline diffusion finite element methods applied to the incompressible Navier-Stokes equations with small viscosity and to some nonlinear hyperbolic conservation laws modelling compressible flow
TL;DR: In this paper, a macroscopic description of micropore structure is given in regard to fluid flow through porous media, where the microflow of an incompressible Newtonian fluid through the rigid porous medium is considered which is assumed to be that of Stokes flow under isothermal and steady conditions.
Abstract: A macroscopic description of micropore structure is discused in regard to fluid flow through porous media. The microflow of an incompressible Newtonian fluid through the rigid porous medium is considered which is assumed to be that of Stokes flow under isothermal and steady conditions. Using volume and area averaging procedures for relative fluid flow, pore structure for the solid skeleton is defined by two parameters. This characterization in macroscale enables one to formulate the proper continuity and motion equations for fluid phase and to disclose the effect of inertial coupling.
01 Jan 1988
01 Dec 1988
01 Jan 1988
TL;DR: In this paper, a diagnostic model is used to reconstruct the wind field on the basis of measurements: an initial wind field generated from available sparse measured data is corrected to satisfy mass conservation by solving a three-dimensional elliptic differential equation.
Abstract: In this paper a diagnostic model is used to reconstruct the wind field on the basis of measurements: An initial wind field generated from available sparse measured data is corrected to satisfy mass conservation by solving a three-dimensional elliptic differential equation. The actual orography is taken into account by transforming this equation to a terrain-following coordinate system. For the solution of the transformed equation a fully vectorized fast elliptic solver is applied. By the aid of the obtained wind fields air parcel trajectories may be calculated to elucidate the prevailing atmospheric transport mechanisms. As an example, wind fields and air parcel trajectories are presented for the Athens basin. The results confirm the features of the sea breeze circulation hinted at by observations and by previous calculations. The identified air movements are discussed in view of the elevated pollution levels in Athens.