Calculate the diffusion time ( D ) and the magnetic Reynolds number (R m ) for a typical MHD generator, with L 0 1 m, u 10 3 m s, and 0 100 mho m Verify that in this case D is very short, so that in homogeneities in the magnetic field are smoothed out rapidly ...

Calculate the diffusion time ( D ) and the magnetic Reynolds number (R m ) for a

Question:

Calculate the diffusion time (τ_D) and the magnetic Reynolds number (R_m) for a typical MHD generator, with L = 0.1 m, u = 10³ m/s, and σ₀ = 100 mho/m. Verify that in this case τ_D is very short, so that in homogeneities in the magnetic field are smoothed out rapidly.

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