The Integral Theorem of the Field Energy

Yıl 2019, Cilt: 32 Sayı: 2, 686 - 703, 01.06.2019

Sergey G. Fedosın

Öz

The integral
theorem of the vector field energy is derived in a covariant way, according to
which under certain conditions the potential energy of the system’s field turns
out to be half as large in the absolute value as the field’s kinetic energy
associated with the four-potential of the field and the four-current of the
system’s particles. Thus, the integral theorem turns out to be the analogue of
the virial theorem, but with respect to the field rather than to the particles.
Using this theorem, it becomes possible to substantiate the fact that
electrostatic energy can be calculated by two seemingly unrelated ways, either
through the scalar potential of the field or through the stres energy-momentum
tensor of the field. In closed systems, the theorem formulation is simplified
for the electromagnetic and gravitational fields, which can act at a distance
up to infinity. At the same time for the fields acting locally in the matter,
such as the acceleration field and the pressure field, in the theorem
formulation it is necessary to take into account the additional term with
integral taken over the system’s surface. The proof of the theorem for an ideal
relativistic uniform system containing non-rotating and randomly moving
particles shows full coincidence in all significant terms, particularly for the
electromagnetic and gravitational fields, the acceleration field and the vector
pressure field.

Anahtar Kelimeler

Vector field, Acceleration field, Pressure field, Relativistic uniform system

Kaynakça

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