... | ... | @@ -67,4 +67,7 @@ $`\begin{array}{lll} |
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where $`Q^+`$ is the viscous heating and $Q^-$ is the radiative cooling.
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We rememver that $`Q^+ = \bar{ \bar \tau}\nabla v`$ where $`\bar{ \bar \tau}\nabla v`$ is the viscous stress tensor. |
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the stress tensor in the 2 dimensional case is:
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$`Q^+ = 2\rho \nu (\tau _{RR}^2+\tau_{\theta \theta}^2
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+{1\over 2}\tau _{R\theta}^2-
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{1\over 3}(\nabla \cdot \vec v)^2)`$ |