Results 231 to 240 of about 8,606 (269)
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Electromagnetic—acoustic evaluation of the permeability of porous media
Acoustical Physics, 2001The generation of ultrasound in a porous water-saturated medium subjected to rapid electromagnetic heating is considered. The irradiation provides the Joule heating of narrow and electrically high resistive pore throats, which interconnect cavities within the medium and, consequently, determine the permeability of the medium.
Davydov, A. A., Lyamshev, L. M.
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Electromagnetic Characterization of Hydraulic Fracture Shape and Permeability
Proceedings, 2015Our numerical proof-of-concept studies demonstrate that surface electric field measurements can provide sensitivity to both the geometric distribution of injected conductive fluids and or conductively enhanced proppant as well as sensitivity to the created hydraulic permeability of the fracture zone.
C. Schwarzbach +3 more
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Electromagnetic response of a permeable inhomogeneous conducting sphere
Geoexploration, 1973Abstract Electromagnetic response of a two-layered spherical model to a dipolar field has been calculated considering the simultaneous influences of a permeable conducting cover, magnetic permeability contrast with the surrounding medium, and radial conductivity variation inside the core.
Chandra P. Gupta +2 more
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The impact of non-linear permeability on electromagnetic stator core tests
7th IET International Conference on Power Electronics, Machines and Drives (PEMD 2014), 2014Routine electromagnetic testing is used to detect developing faults in the stator cores of large electrical machines. However the non-linear permeability and hysteresis of electrical steel cause the development of harmonics in the magnetic field, potentially affecting fault interpretation.
Bertenshaw, D. R., Smith, A. C.
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Current Sheet Permeability in Electromagnetic Pulsed Plasma Thrusters [PDF]
38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2002 A case is made for the existence of permeability of current sheets in electromagneticpulsed plasma thrusters. Permeability refers to the leakage of plasma or neutral par-ticles behind the sheet and could cause a significant effect on the performance of thethruster. Analytical calculations are presented which demonstrate the mismatch be-tween experimental
Edgar Y. Choueiri, John Berkery
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Inversion of Multifrequency Electromagnetic Data to a Conductive and Permeable Sphere
Symposium on the Application of Geophysics to Engineering and Environmental Problems 2001, 2001We have developed an algorithm for inverting broadband electromagnetic (EM) data to determine its electrical conductivity, magnetic permeability, radius, and depth using a sphere model. The algorithm is based on traditional non-linear inverse methods with singular value decomposition.
I. J. Won, Haoping Huang
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Permeability enhancement of Kv1.2 potassium channel by a terahertz electromagnetic field
The Journal of Chemical Physics, 2023As biomolecules vibrate and rotate in the terahertz band, the biological effects of terahertz electromagnetic fields have drawn considerable attention from the physiological and medical communities. Ion channels are the basis of biological electrical signals, so studying the effect of terahertz electromagnetic fields on ion channels is significant.
Xiaofei Zhao +6 more
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Inclusion of Finite Permeability on Design and Optimization of an Electromagnetic Undulator
Chinese Physics Letters, 2014We derive an alternate analytical expression for the optimum dimensions of an electromagnetic undulator with a finite permeability lamination core. The analytical expressions are compared with earlier results under an infinite permeability approximation of the lamination core of the electromagnetic undulator design.
Vijay Huse +3 more
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Transient electromagnetic response of a permeable nonuniformly conducting sphere
Journal of Applied Physics, 1975Quasistatic response of a nonuniformly conducting and magnetically permeable sphere to a step pulse is obtained. the effect of conductivity distribution pattern and permeability of the sphere on the transient response is examined in detail. The results show that the introduction of conductivity inhomogeneity has considerable effect on the observed ...
Madhu S. Joshi, Saurabh K. Verma
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