Using Animated Textures to Visualize Electromagnetic Fields and Energy Flow

Details Using Animated Textures to Visualize Electromagnetic Fields and Energy Flow Using Animated Textures to Visualize Electromagnetic Fields and Energy Flow

2008-02-27

arxiv.org/abs/0802.4034v1

Physics

Physics Education

Scientific paper

Animated textures can be used to visualize the spatial structure and temporal evolution of vector fields at high spatial resolution. The animation requires two time-dependent vector fields. The first of these vector fields determines the spatial structure to be displayed. The second is a velocity field that determines the time evolution of the field lines of the first vector field. We illustrate this method with an example in magneto-quasi-statics, where the second velocity field is taken to be the ExB drift velocity of electric monopoles. This technique for displaying time-dependent electromagnetic fields has three pedagogical advantages: (1) the continuous nature of the representation underscores the action-by-contact nature of forces transmitted by fields; (2) the animated texture motion shows the direction of electromagnetic energy flow; and (3) the time-evolving field configuration enables insights into Maxwell stresses.

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