Visualizing Poynting vector energy flow in electric circuits

Morris, Noah A.; Styer, Daniel F.

doi:10.1119/1.3679838

Cited by 8 publications

(1 citation statement)

References 9 publications

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“…In general, electromagnetic energy flow visualisations can provide excellent physical insight into the relationship between voltage sources and sinks. Several authors have looked at the flow of energy from batteries to resistors in circuits, with results that are sometimes counter-intuitive [14,15]. Generally, electromagnetic energy emanates from batteries and is deposited in resistors that act as sinks and consequently heat up.…”

Section: Poynting Energy Flowmentioning

confidence: 99%

Energy flow in terrestrial controlled-source electromagnetic geophysics

Everett¹,

Chave²

2019

Eur. J. Phys.

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Visualisations of the flow of electromagnetic energy based on the time-averaged Poynting vector have yielded important and sometimes counter-intuitive physical insights in the case of electric circuits containing resistors and inductors. Less well-understood is the flow of electromagnetic energy in spatially contiguous media excited by grounded sources. In geophysics, for example, it is important for readers to recognise how geological structures help shape controlled-source electromagnetic responses. It is demonstrated herein using energy flow visualisations how a resistive layer impeding vertical electric current flow will produce a larger anomalous response to grounded-source excitation at the Earth’s surface than an equivalent conductive layer.

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Section: Poynting Energy Flowmentioning

confidence: 99%

Energy flow in terrestrial controlled-source electromagnetic geophysics

Everett¹,

Chave²

2019

Eur. J. Phys.

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Behaviour of Poynting vector for dielectric-metal-dielectric optical waveguides and applications

Anand

Kushwah

2020

Opt Quant Electron

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Comparison of Poynting’s vector and the power flow used in electrical engineering

Mörée

Leijon

2022

AIP Advances

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This paper will analyze how the energy flux of Poynting’s vector is compared to the power flow in electrical engineering, where the power, instead, is defined by voltages and currents. There are alternatives to Poynting’s energy flux vector that agree more with circuit theory methods such that the energy flow is in the current conductor and not in the insulation surrounding it. One such basic formulation would only consist of the total current density and the voltage potential, but it would need an alternative theorem for energy transfer. Another formulation proposed by Slepian would instead still agree with Poynting’s energy transfer theorem, but it needs to add the power of alternating magnetic vector potential. The alternatives to Poynting’s vector may better illustrate the energy flow in electrical engineering, but two things could be considered in their generality. First, since they are expressed by potentials, they are gauge invariant and depend on the definition of the potentials. Second, Poynting’s vector is used to formulate the electromagnetic momentum, and any alternative energy flow vectors would not. These two notes are of minor importance in electrical engineering, and the alternatives could be used as good alternatives for describing power flow. The main purpose of this paper is to bridge the differences between the physical theory of energy flux and the methods in electrical power engineering. This could simplify the use of energy flux and Poynting’s vector in engineering problems.

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Visualizing Poynting vector energy flow in electric circuits

Cited by 8 publications

References 9 publications

Energy flow in terrestrial controlled-source electromagnetic geophysics

Energy flow in terrestrial controlled-source electromagnetic geophysics

Behaviour of Poynting vector for dielectric-metal-dielectric optical waveguides and applications

Comparison of Poynting’s vector and the power flow used in electrical engineering

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