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力密度（Force Density）の基礎知識流体力学と電磁気学における役割

力密度流体力学圧力勾配電磁気学

2026年8月12日続きを読む →

The field lines of a vector field F through surfaces with unit normal n, the angle from n to F is θ. Flux is a measure of how much of the field passes through a given surface. F is decomposed into components perpendicular (⊥) and parallel ( ‖ ) to n. Only the parallel component contributes to flux because it is the maximum extent of the field passing through the surface at a point, the perpendicular component does not contribute. Top: Three field lines through a plane surface, one normal to the surface, one parallel, and one intermediate. Bottom: Field line through a curved surface, showing the setup of the unit normal and surface element to calculate flux.

フラックス（束）の概念と物理学・数学における応用

フラックス束ベクトル場表面積分

2026年8月9日続きを読む →