Results 21 to 30 of about 1,467,433 (277)

Surface Rejuvenation Model for Turbulent Thermophoresis Velocity

open access: yesEngineering Proceedings, 2023
A mathematical presentation of the surface rejuvenation model is used to relate the mean velocity and temperature distribution to the mean vortex dwell time and approach distance.
Ming-Chi Chiou, Hung-Yih Tsai
doaj   +1 more source

Lagrangian measurements of turbulent dissipation over a shallow tidal flat from pulse coherent Acoustic Doppler Profilers [PDF]

open access: yes, 2012
We present high resolution (25 mm spatial, 8 Hz temporal) profiles of velocity measured over a shallow tidal flat using pulse-coherent Acoustic Doppler Profilers mounted on surface drifters.
Henderson, Stephen M.   +1 more
core   +2 more sources

Shallow S-wave Velocity Profile Estimation using Surface Velocity and Microtremor HVSR with a Linear Velocity Increase Approach

open access: yesJournal of Mathematical and Fundamental Sciences, 2023
We propose a simple method for 1D S-wave velocity (Vs) profile estimation using a measured surface S-wave velocity (V1) and peak frequency of the observed microtremor horizontal-to-vertical spectral ratio (HVSR).
Andi Muhamad Pramatadie   +2 more
doaj   +1 more source

A Combined Approach for Filtering Ice Surface Velocity Fields Derived from Remote Sensing Methods

open access: yesRemote Sensing, 2017
Various glaciological topics require observations of horizontal velocities over vast areas, e.g., detecting acceleration of glaciers, as well as for estimating basal parameters of ice sheets using inverse modelling approaches. The quality of the velocity
Christine Lüttig   +2 more
doaj   +1 more source

Physical modeling of glacier contact with bedrock (experiment)

open access: yesЛëд и снег, 2015
Studies of the adhesive strength of glacial ice connection with bedrock has been studied using the analysis of the amplitude-frequency characteristics of acoustic emission (AE) in the frequency range from 15 Hz to 20,000 Hz.
V. P. Epifanov   +2 more
doaj   +1 more source

What drives the velocity dispersion of ionized gas in star-forming galaxies? [PDF]

open access: yes, 2019
We analyze the intrinsic velocity dispersion properties of 648 star-forming galaxies observed by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, to explore the relation of intrinsic gas velocity dispersions with star formation ...
Bing, Longji   +13 more
core   +2 more sources

Experimental investigation on free surface vortices driven by tangential inlets [PDF]

open access: yes, 2016
Particle Image Velocimetry (PIV) measurements have been carried out in order to analyze the structure of free surface vortices in a promoting geometry with two tangential inlets. Velocity fields associated to the free surface vortex have been obtained at
Caruso, Gianfranco   +3 more
core   +1 more source

Water Surface and Velocity Measurement-River and Flume [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
Understanding the flow of water in natural watercourses has become increasingly important as climate change increases the incidence of extreme rainfall events which cause flooding.
J. H. Chandler   +3 more
doaj   +1 more source

Effective velocity boundary condition at a mixed slip surface [PDF]

open access: yes, 2006
This paper studies the nature of the effective velocity boundary conditions for liquid flow over a plane boundary on which small free-slip islands are randomly distributed.
A. PROSPERETTI   +8 more
core   +3 more sources

SURFACE FLOW VELOCITY MEASUREMENTS FROM UAV-BASED VIDEOS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019
Most measuring methods for determining the volumetric flow rate or surface flow velocity have in common that they cannot be safely used under extreme outflow conditions. Especially in catastrophic situations, it is of particular interest to determine the
J. Brauneck, T. Gattung, R. Jüpner
doaj   +1 more source

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