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--- projekty:veda:inspirace:fyzika:tekutina:vilhelm_bjerknes:start [17.02.2024 23:56]
Marek Ištvánek
+++ projekty:veda:inspirace:fyzika:tekutina:vilhelm_bjerknes:start [29.04.2024 19:02] (aktuální)
Marek Ištvánek
@@ Řádek 1: / Řádek 1: @@
 ====== Vilhelm Friman Koren Bjerknes ======
-[[wpcs>Vilhelm_Bjerknes]] (1862-1951
+[[wpcs>Vilhelm_Bjerknes|Souhrn]] (1862-1951)
 Norský fyzik. Jeden ze zakladatelů moderní meteorologie, čili předpovědi počasí, a fyzikální hydrodynamiky.
@@ Řádek 34: / Řádek 34: @@
 > ... the light body will be repelled, and the heavy body attracted by the pulsating or the oscillating body.
+==== Vzájemné působení přímých vírů  ====
+> ... parallel vortices which rotate in the same sense, and which correspond thus to currents of the same direction, will repel, while vortices rotating in the opposite direction will attract each other.
+==== Analogie mezi hydrodynamikou a elektromagnetismem ====
+> Of course, if there exists a close analogy between hydrodynamic and electromagnetic fields, this analogy must be contained implicitly in the fundamental equations of the two kinds of fields, namely in the hydrodynamic equations of motion on the one hand, and in Maxwell's equations of the electromagnetic field on the other.
+> We have succeeded in proving this : the vibratory hydrodynamic field has the same geometric configuration as an electrostatic or a magnetic field. In the hydrodynamic field there are forces whose resultant upon finite bodies oppositely corresponds to the corresponding resultant forces in the electric or magnetic field.
+> ... we have no hydrodynamic analogy extending to the electromagnetic phenomena of the most general type ...
+> ... stresses, even in Heaviside's theory, are introduced only to explain the visible motion observed in the field, not the formation or maintenance of the field itself.
+> It may, therefore, be a question whether //this// will not be the great problem in the theory of electricity, to find a stress which accounts for both the formation and propagation of the electromagnetic field and for the visible motions of the charged or polarized bodies, just as the pressure in the fluid accounts for both the formation of the hydrodynamic field and for the visible motions of the pulsating or oscillating bodies.
+> What should be the properties of a medium, whose fields shall give the completest possible analogy to electromagnetic fields?

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