scholarly journals Разрушение эмульсий вода в масле" при воздействии неоднородного переменного электрического поля

2020 ◽  
Vol 46 (5) ◽  
pp. 52
Author(s):  
Э.С. Батыршин ◽  
А.И. Муллаянов ◽  
С.П. Саметов
Keyword(s):  
Electric Field ◽  
Optical Microscopy ◽  
Quantitative Estimate ◽  
High Speed ◽  
Experimental Approach ◽  
High Speed Imaging ◽  
Alternating Electric Field ◽  
Oil Emulsions

The paper presents an experimental approach using microfluidics methods, optical microscopy and high-speed imaging for studying a destruction of water-in-oil emulsions under a non-uniform alternating electric field. A quantitative estimate of parameters characterizing the emulsion destruction dynamics was made. The method can be used for developing effective techniques for water-in-oil emulsions destruction including combined with other affecting methods: chemical, acoustic, thermal, etc.

scholarly journals Исследование процесса коалесценции капель эмульсии в неоднородном переменном электрическом поле при наличии межфазной асфальтеновой пленки на границе раздела масло-вода

2022 ◽  
Vol 48 (2) ◽  
pp. 27
Author(s):  
А.И. Муллаянов ◽  
Р.Ш. Осипова ◽  
А.А. Мусин ◽  
Л.А. Ковалева
Keyword(s):  
Electric Field ◽  
Optical Microscopy ◽  
Applied Field ◽  
High Speed ◽  
Oil Emulsion ◽  
High Speed Video ◽  
Quantitative Estimates ◽  
Alternating Electric Field ◽  
Oil Emulsions ◽  
Water In Oil Emulsion

The behavior of a water-in-oil emulsion stabilized with asphaltenes under the action of an inhomogeneous alternating electric field has been studied. The experimental technique is based on the use of microfluidics, optical microscopy, and high-speed video filming. Quantitative estimates of the parameters characterizing the dynamics of the destruction of the emulsion, depending on the frequency and amplitude of the applied field, are obtained. The method will be useful in the development of effective methods for breaking emulsions and modifying existing technologies for separating oil emulsions into phases.

THE INTERACTION BETWEEN ELECTRORHEOLOGICAL PARTICLES IN AC ELECTRIC FIELD STUDIED USING OPTICAL TWEEZERS

2002 ◽  
Vol 16 (17n18) ◽  
pp. 2300-2306
Author(s):  
J. XU ◽  
X. DONG ◽  
Z. Y. CHEN ◽  
Y. G. JIANG ◽  
L. W. ZHOU
Keyword(s):  
Image Processing ◽  
Electric Field ◽  
Optical Tweezers ◽  
High Speed ◽  
Sampling Rate ◽  
Interaction Strength ◽  
Processing System ◽  
Dipole Interaction ◽  
High Speed Imaging ◽  
Ac Electric Field

The dipole interaction between a pair of electrorheological (ER) particles under an external AC electric field was confirmed in a dynamic case using optical tweezers positioning and a system of high speed imaging and image processing. By measuring the interactions between two micron-sized ER particles with both central distance and structure forming time, the structure response time and the interaction strength were obtained for the particles under an AC electric field. The spacial resolution of the optical tweezers-high speed imaging-image processing system is 0.26μm. The sampling rate of the high-speed video recorder is up to 8000 frame/s with the corresponding time resolution being 0.125 ms.

scholarly journals Control of Porosity and Spatter in Laser Welding of Thick AlMg5 Parts Using High-Speed Imaging and Optical Microscopy

Metals ◽  
2017 ◽  
Vol 7 (11) ◽  
pp. 452 ◽  
Author(s):  
Andrei Popescu ◽  
Christophe Delval ◽  
Marc Leparoux
Keyword(s):  
Laser Welding ◽  
Optical Microscopy ◽  
High Speed ◽  
High Speed Imaging

scholarly journals Unlocking the secrets of multi-flagellated propulsion: drawing insights from Tritrichomonas foetus

2014 ◽  
Vol 11 (93) ◽  
pp. 20131149 ◽  
Author(s):  
Scott C. Lenaghan ◽  
Stefan Nwandu-Vincent ◽  
Benjamin E. Reese ◽  
Mingjun Zhang
Keyword(s):  
High Speed ◽  
Experimental Approach ◽  
Flexural Rigidity ◽  
Tritrichomonas Foetus ◽  
Propulsive Force ◽  
High Speed Imaging ◽  
Resistive Force ◽  
Thrust Generation ◽  
Run And Tumble ◽  
Resistive Force Theory

In this work, a high-speed imaging platform and a resistive force theory (RFT) based model were applied to investigate multi-flagellated propulsion, using Tritrichomonas foetus as an example. We discovered that T. foetus has distinct flagellar beating motions for linear swimming and turning, similar to the ‘run and tumble’ strategies observed in bacteria and Chlamydomonas . Quantitative analysis of the motion of each flagellum was achieved by determining the average flagella beat motion for both linear swimming and turning, and using the velocity of the flagella as inputs into the RFT model. The experimental approach was used to calculate the curvature along the length of the flagella throughout each stroke. It was found that the curvatures of the anterior flagella do not decrease monotonically along their lengths, confirming the ciliary waveform of these flagella. Further, the stiffness of the flagella was experimentally measured using nanoindentation, allowing for calculation of the flexural rigidity of T. foetus' s flagella, 1.55×10 −21 N m 2 . Finally, using the RFT model, it was discovered that the propulsive force of T. foetus was similar to that of sperm and Chlamydomonas , indicating that multi-flagellated propulsion does not necessarily contribute to greater thrust generation, and may have evolved for greater manoeuvrability or sensing. The results from this study have demonstrated the highly coordinated nature of multi-flagellated propulsion and have provided significant insights into the biology of T. foetus .

Experimental Measurement of In-Plane Rolling Nonpneumatic Tire Vibrations Using High-Speed Imaging

2019 ◽  
Vol 47 (3) ◽  
pp. 196-210
Author(s):  
Meghashyam Panyam ◽  
Beshah Ayalew ◽  
Timothy Rhyne ◽  
Steve Cron ◽  
John Adcox
Keyword(s):  
High Speed ◽  
Image Correlation ◽  
Dynamic Mode Decomposition ◽  
Dynamic Mode ◽  
High Speed Imaging ◽  
Correlation Algorithm ◽  
Mode Decomposition ◽  
Series Of Experiments ◽  
Plane Deformations ◽  
Dominant Frequencies

ABSTRACT This article presents a novel experimental technique for measuring in-plane deformations and vibration modes of a rotating nonpneumatic tire subjected to obstacle impacts. The tire was mounted on a modified quarter-car test rig, which was built around one of the drums of a 500-horse power chassis dynamometer at Clemson University's International Center for Automotive Research. A series of experiments were conducted using a high-speed camera to capture the event of the rotating tire coming into contact with a cleat attached to the surface of the drum. The resulting video was processed using a two-dimensional digital image correlation algorithm to obtain in-plane radial and tangential deformation fields of the tire. The dynamic mode decomposition algorithm was implemented on the deformation fields to extract the dominant frequencies that were excited in the tire upon contact with the cleat. It was observed that the deformations and the modal frequencies estimated using this method were within a reasonable range of expected values. In general, the results indicate that the method used in this study can be a useful tool in measuring in-plane deformations of rolling tires without the need for additional sensors and wiring.

Sign in / Sign up

Export Citation Format

Share Document