Numerical electromagnetic analysis applications

Numerical Electromagnetic Analysis Methods and Their Application in Transient Analyses... 

CIGRE WG C4-501 (Convener Ametani, A.). 2013. Guideline for Numerical Electromagnetic Analysis Method and Its Application to Surge Phenomena. CIGRE-TB 543. 

Ametani, A., T. Hoshino, M. Ishii, T. Noda, S. Okabe, and K. Tanabe. 2008. Numerical electromagnetic analysis method and its application to surge phenomena. CIGRE 2008... 

Solving this type of transient requires the use of numerical electromagnetic analysis (NEA). Chapter 5 first discusses the basic theory of NEA and then describes various methods of NEA, for example, either in a frequency domain or in a time domain. It provides a brief summary of the methods and demonstrates application examples. Some of the examples compare field test results with EMTP simulation results. 

Pokharel, R. K. and M. Ishii. 2007. Applications of time-domain numerical electromagnetic code to lightning surge analysis. IEEE Trans. Electromagn. Compat. 49(3) 623-631. 

This chapter describes several applications of absorption and emission of electromagnetic radiation in chemical analysis. Another application—spectrophotometric titrations—was already covered in Section 7-3. We also use Excel SOLVER and spreadsheet matrix manipulations as powerful tools for numerical analysis. 

Structural features of disperse systems, in particular the existence of the electrical double layer (EDL), are responsible for a number of peculiar phenomena related to heat and mass transfer and electric current propagation in such systems. The description of electromagnetic radiation propagation is also included in this chapter. These features are utilized in numerous practical applications and underlie methods used to study disperse systems. These methods include particle size distribution analysis, studies of the surface structure and of near-surface layers, the structure of the EDL, etc. In the most general way the most transfer phenomena can be described by the laws of irreversible thermodynamics, which allow one to carry out a systematic investigation of different fluxes that originate as a result of the action of various generalized forces. 

The analysis of the electromagnetic field of a vertical magnetic dipole located either on the axis of cylindrical interfaces (formations of an infinite thickness) or in a medium with horizontal interfaces only allows us to investigate the influence of the borehole and the invasion zone, as well as the effect caused by a finite thickness of the formation. For such models application of the separation of variables method is the most natural approax h enabling us to present the field in a explicit form by known functions. It is a much more complicated problem when the vertical magnetic dipole is located on the borehole axis and the formation has a finite thickness. In this case the method of separation of variable cannot be used, since both cylindrical and horizontal interfaces are present and it is more appropriate to apply such numerical methods as integral equations or finite elements. 

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