\[ \Ddt{\rho \tilde{\nu}} = \div \left( \rho D_\tilde{\nu} \tilde{\nu} \right) + \frac{C_{b2}}{\sigma_{\nu_t}} \rho \mag{\grad \tilde{\nu}}^2 + C_{b1} \rho \tilde{S} \tilde{\nu} \left(1 - f_{t2}\right) - \left(C_{w1} f_w - \frac{C_{b1}}{\kappa^2} f_{t2}\right) \rho \frac{\tilde{\nu}^2}{\tilde{d}^2} + S_\tilde{\nu} \]
The turbulence viscosity is obtained using:
\[ \nu_t = \tilde{\nu} f_{v1} \]
where the function \( f_{v1} \) is given by
\[ f_{v1} = \frac{\chi^3}{\chi^3 + C_{v1}^3} \]
and
\[ \chi = \frac{\tilde{\nu}}{\nu} \]
\( \sigma_{\nu_t} \) | \( C_{b1} \) | \( C_{b2} \) | \( C_{w1} \) | \( C_{w2} \) | \( C_{w3} \) |
---|---|---|---|---|---|
2/3 | 0.1355 | 0.622 | \(\frac{C_{b1}}{\kappa^2} + \frac{1 + C_{b2}}{\sigma_{\nu_t}} \) | 0.3 | 2 |
\( C_{v1} \) | \( C_{s} \) |
---|---|
7.1 | 0.3 |
The model is specified using:
RAS { turbulence on; RASModel SpalartAllmaras; }
Source code:
References:
Related:
Would you like to suggest an improvement to this page? | Create an issue |
Copyright © 2016-2017 OpenCFD Ltd.