民俗学 发表于 2025-3-21 16:37:03
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Symmetric Magnetohydrodynamic Flow and Helical Waves in a Circular Plasma Cylinder,, being independent of the third coordinate q.. The existence of this kind of symmetry allows the introduction of a number of integrals of the motion and simplifies the analysis considerably. The most general form of spatial symmetry is helical symmetry, in which all quantities are constant along th纪念 发表于 2025-3-22 00:44:14
denoted by , the dot product by (AB), the Laplacian operator by b., the curl by rot, etc. It might also be worth pointing Out that the temperature is frequently expressed in energy units in the Soviet literature so that the Boltzmann con stant will be missing in various familiar expressions. ISynovial-Fluid 发表于 2025-3-22 06:43:09
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Symmetric Magnetohydrodynamic Flow and Helical Waves in a Circular Plasma Cylinder,e helices . — .z = const, . = const, characterized by a fixed pitch L = 2π/α. In order to formulate a general theory of symmetric flow which includes the case of helical symmetry, it is necessary to carry out the calculations in a nonorthogonal curvilinear coordinate system q. (cf. Appendix).Juvenile 发表于 2025-3-22 14:28:49
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