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Average Linear and Angular Momentum and Power of Random Fields Near a Perfectly Conducting Boundary.

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Title: Average Linear and Angular Momentum and Power of Random Fields Near a Perfectly Conducting Boundary.
Authors: Arnaut, Luk R.1 (AUTHOR) l.arnaut@qmul.ac.uk, Gradoni, Gabriele2 (AUTHOR) gabriele.gradoni@nottingham.ac.uk
Source: IEEE Transactions on Electromagnetic Compatibility. Aug2020, Vol. 62 Issue 4, p1118-1127. 10p.
Subjects: Linear momentum, Angular momentum (Mechanics), Radiation, Monte Carlo method, Deviatoric stress (Engineering), Random fields, Markov random fields
Abstract: The effect of a perfectly conducting planar boundary on the average linear momentum (LM), angular momentum (AM), and their power of a time-harmonic statistically isotropic random field is analyzed. These averages are purely imaginary, and their magnitude decreases in a damped oscillatory manner with distance from the boundary. At discrete quasi-periodic distances and frequencies, the average LM and AM attain their free-space value. Implications for the optimal placement or tuning of power and field sensors are analyzed. Conservation of the flux of the mean LM and AM with respect to the difference of the average electric and magnetic energies and the radiation stresses via the Maxwell stress dyadic is demonstrated. The second-order spatial derivatives of differential radiation stress can be directly linked to the electromagnetic energy imbalance. Analytical results are supported by Monte Carlo simulation results. As an application, performance-based estimates for the working volume of a reverberation chamber are obtained. In the context of multiphysics compatibility, mechanical self-stirred reverberation is proposed as an exploitation of electromagnetic stress. [ABSTRACT FROM AUTHOR]
Copyright of IEEE Transactions on Electromagnetic Compatibility is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Average Linear and Angular Momentum and Power of Random Fields Near a Perfectly Conducting Boundary.
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  Data: <searchLink fieldCode="DE" term="%22Linear+momentum%22">Linear momentum</searchLink><br /><searchLink fieldCode="DE" term="%22Angular+momentum+%28Mechanics%29%22">Angular momentum (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Radiation%22">Radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Monte+Carlo+method%22">Monte Carlo method</searchLink><br /><searchLink fieldCode="DE" term="%22Deviatoric+stress+%28Engineering%29%22">Deviatoric stress (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Random+fields%22">Random fields</searchLink><br /><searchLink fieldCode="DE" term="%22Markov+random+fields%22">Markov random fields</searchLink>
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  Data: The effect of a perfectly conducting planar boundary on the average linear momentum (LM), angular momentum (AM), and their power of a time-harmonic statistically isotropic random field is analyzed. These averages are purely imaginary, and their magnitude decreases in a damped oscillatory manner with distance from the boundary. At discrete quasi-periodic distances and frequencies, the average LM and AM attain their free-space value. Implications for the optimal placement or tuning of power and field sensors are analyzed. Conservation of the flux of the mean LM and AM with respect to the difference of the average electric and magnetic energies and the radiation stresses via the Maxwell stress dyadic is demonstrated. The second-order spatial derivatives of differential radiation stress can be directly linked to the electromagnetic energy imbalance. Analytical results are supported by Monte Carlo simulation results. As an application, performance-based estimates for the working volume of a reverberation chamber are obtained. In the context of multiphysics compatibility, mechanical self-stirred reverberation is proposed as an exploitation of electromagnetic stress. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of IEEE Transactions on Electromagnetic Compatibility is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/TEMC.2019.2928246
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      – Code: eng
        Text: English
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        PageCount: 10
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      – SubjectFull: Linear momentum
        Type: general
      – SubjectFull: Angular momentum (Mechanics)
        Type: general
      – SubjectFull: Radiation
        Type: general
      – SubjectFull: Monte Carlo method
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      – SubjectFull: Deviatoric stress (Engineering)
        Type: general
      – SubjectFull: Random fields
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      – SubjectFull: Markov random fields
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      – TitleFull: Average Linear and Angular Momentum and Power of Random Fields Near a Perfectly Conducting Boundary.
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              Text: Aug2020
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