Ultrasonic tomography for in‐process measurements of temperature in a multi‐phase medium

1993 ◽  
Vol 94 (2) ◽  
pp. 1176-1176 ◽  
Author(s):  
Laurence S. Beller
Keyword(s):  
Ultrasonic Tomography ◽  
Phase Medium ◽  
Process Measurements ◽  
Multi Phase

scholarly journals A New Prototype for Automatic Identification of Stone Block Internal Structure

2021 ◽  
Vol 11 (14) ◽  
pp. 6630
Author(s):  
Bernardo Anes ◽  
Joao Figueiredo ◽  
Mouhaydine Tlemçani
Keyword(s):  
Internal Structure ◽  
Empirical Method ◽  
Automatic Process ◽  
Automatic Identification ◽  
Ultrasonic Tomography ◽  
Stone Block ◽  
Novel Approach ◽  
Process Measurements ◽  
Automatic Positioning ◽  
Non Destructive

Nowadays, the inner shape and economic viability of a stone block is dependent on the skill and experience of the “expert” that makes predictions based on external observations. This actual procedure is an extremely high empirical method, and when it fails, substantial work, time, and money is wasted. At present, researchers are committed to developing models to predict the stone block internal structure based on non-destructive tests. Ultrasonic tomography and electrical resistivity tomography are the tests that best fit these objectives. Trying to improve the existing procedures for collecting stone information and data exporting, a novel approach to perform both tomographies is proposed in this paper. This novel approach presents sound advantages regarding the current manual procedure: namely, (i) high accuracy due to a new automatic positioning system; (ii) no need for highly skilled operators to process measurements; (iii) measurements are much easier to derive, and results are quickly delivered. A comparison between the new automatic process and the current manual procedure shows that the manual procedure has a very low accuracy when compared to the new developed automatic system. The automatic measurements show extremely significant time savings, which is a relevant issue for the future competitiveness of the stone sector.

Application of Low-Frequency Energy Increment Technology in Hydrocarbon Prediction

2012 ◽  
Vol 472-475 ◽  
pp. 178-182
Author(s):  
Zhi Ming Li ◽  
Xue Yan Hu ◽  
Ling Xia Zhen
Keyword(s):  
Laboratory Data ◽  
Low Frequency ◽  
Biot Theory ◽  
Hydrocarbon Detection ◽  
Hydrocarbon Prediction ◽  
Phase Medium ◽  
Multi Phase ◽  
Cave Detection ◽  
Fluid Detection ◽  
Energy Increment

Based on the Biot theory and laboratory data, engineers of LandOcean recently develop a certain technology for hydrocarbon detection in multi-phase medium in order to reduce ambiguity and uncertainty. The sensitivity of the technology is superior to others especially in carbonate pores and cave detection, igneous hydrocarbon prediction and fluid detection of non-well areas. A number of projects and wells drilling proved that this technology is effective and reliable.

scholarly journals Mathematical Simulation of the Behavior of a Cumulative Jet with Inert and Reactive Components

2019 ◽  
pp. 19-34
Author(s):  
A.V. Babkin ◽  
A.A. Medeltsev ◽  
F.S. Zagryadskiy ◽  
M.A. Krutskevich
Keyword(s):  
Extension Problem ◽  
Composite Liner ◽  
Three Phase ◽  
Phase Medium ◽  
Chemically Reacting Systems ◽  
Reactive Additives ◽  
Chemically Reacting ◽  
Characteristic Features ◽  
Reacting Systems ◽  
Multi Phase

The purpose of the research was to investigate the processes associated with the free flight of a cumulative jet formed from a composite liner of a cumulative charge. We mathematically simulated the process from the perspective of continuum mechanics using numerical methods for solving the corresponding equations. The cumulative jet was simulated in the quasi-two-dimensional nonstationary approximation as a high-gradient cylindrical compressible elastoplastic or liquid rod. The material of the jet was considered as a one-speed three-phase medium. The compressibility of each phase was described by its inherent barotropic dependence of pressure on density. The resulting pressure in a multiphase mixture of particles of the cumulative jet, considered as a composite material, was determined on the basis of the additivity condition of the volumes. When assessing the composition of the jet, we determined the initial concentrations of the components using a software package for thermo-dynamic simulation of chemically reacting systems. To find the numerical solution of the multi-phase, i.e., composite, jet extension problem, we used a finite-difference method based on Neumann --- Richtmyer scheme. The numerical analysis of the process under study was carried out on the example of a laboratory cumulative charge. Within the research, we found the characteristic features and possible variations in the behavior of the jet depending on the presence of the components of the composite liner, i.e., matrix, inert and reactive additives, and their properties. Finally, we estimated the change in the penetrating power of the jet compared to the reference variant of the cumulative liner of a homogeneous single-phase monolithic material.

scholarly journals Multi-Phase Dynamics of Magnetized Interstellar Medium

2009 ◽  
Vol 5 (H15) ◽  
pp. 444-445
Author(s):  
Shu-ichiro Inutsuka
Keyword(s):  
Interstellar Medium ◽  
Thermal Instability ◽  
Transition Dynamics ◽  
Phase Dynamics ◽  
Field Amplification ◽  
Linear Perturbations ◽  
Phase Medium ◽  
Strong Motivation ◽  
Multi Phase ◽  
The Magnetic Field

AbstractThe recent progress in our understanding of the dynamics of muliti-phase interstellar medium (ISM) is reviewed. Non-linear perturbations (e.g., shock waves or time-dependent radiation field) lead to the interchange between warm phase and cold phase via thermal instability. Dynamical modelling of this phase transition dynamics is essential in describing ubiquitous turbulence in ISM and the formation of molecular clouds. A concept of magnetically multi-phase medium is introduced. Recent finding of the magnetic field amplification in the blast wave propagating in magnetized multi-phase ISM is providing a strong motivation for rapid acceleration of cosmic rays.

scholarly journals Supernova Remnants in the UWISH2 and UWIFE Surveys

2013 ◽  
Vol 9 (S296) ◽  
pp. 370-371
Author(s):  
Yong-Hyun Lee ◽  
Bon-Chul Koo ◽  
Jae-Joon Lee
Keyword(s):  
Supernova Remnants ◽  
Preliminary Results ◽  
Phase Medium ◽  
Line Features ◽  
Multi Phase ◽  
Identification Strategy

AbstractWe report the preliminary results for the detection of H2 and [Fe II] line features around the Galactic supernova remnants (SNRs) from the UWISH2 and UWIFE surveys that cover the first galactic quadrant of 7°<l<65° and |b|<1.3°. By this time, we have found a total of 17 H2-emitting and 14 [Fe II]-emitting SNRs in the coverage, and more than a half of them are detected in both H2 and [Fe II] emissions, which implies that the environment of these SNRs might be complex and composed of multi-phase medium. In this paper, we present our identification strategy and some preliminary results including H2 and [Fe II] luminosity distributions.

scholarly journals Simulation of AGN feedback and its impact on galaxies

2016 ◽  
Vol 12 (S324) ◽  
pp. 231-234
Author(s):  
Martin A. Bourne
Keyword(s):  
Black Holes ◽  
Large Scale ◽  
Accretion Disc ◽  
Moving Mesh ◽  
Host Galaxy ◽  
Scaling Relations ◽  
Mass Outflow ◽  
Phase Medium ◽  
Energy Conserving ◽  
Multi Phase

AbstractFeedback released during the growth of supermassive black holes is expected to play a key role in shaping black hole-host galaxy co-evolution. Powerful, accretion disc driven winds have been invoked to explain both observed scaling relations (e.g., M − σ) and large-scale outflows with mass outflow rates of ~ 100 − 1000 M⊙ yr−1 and momentum rates of up to ~ 30 LAGN/c. Critically, how these winds couple to the host galaxy depends on if they are momentum or energy conserving. I outline observational signatures that could distinguish between these regimes and discuss their roles in establishing galaxy properties. Furthermore, I discuss high-resolution simulations exploring feedback in a multi-phase medium, highlighting how structural properties of galaxies can impact feedback efficiency. Finally, feedback, in the form of collimated jets, is expected to regulate cooling in galaxy clusters. I discuss new simulations of jet feedback using the moving-mesh code AREPO and outline the scope of our new study.

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