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Table 2

Hydrogen dynamic viscosity coefficient [in units kg/(s m) = Pa s] for several temperatures.

T [K] 4400 4990 6560 11 150
σHH (a.u.) 45.35 45.3 40 33.5
ηHH 3.95 × 10-5 4.2 × 10-5 5.5 × 10-5 0.86 × 10-4
ηcc 10 × 10-5 11 × 10-5 13 × 10-5 1.67 × 10-4
ηexp 4.8 × 10-5 5.5 × 10-5 7 × 10-5 1.1 × 10-4

Notes.Second row: temperature-dependent cross section from Fig. 3. Third row: our value based on Eq. (24). Fourth row: value based on the Chapman and Cowling hard sphere model (25). Fifth row: experimental values for pure neutral hydrogen from Vargaftik et al. (1996).

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