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Extra info for Babbit Bearing Techniques
At the outflow boundary, 6near extrapolation of density and mass fluxes, with fixed presSlJ'e are used Row density is also linearly extrapolated. Lower and upper wake ceUs overlap creating a wake boundary. These conditions were used throughout the work performed for project EUROVAL. 4 Grid Adaption Grids used were provided by BAe to all partners for commonality purposes. This gid was modified by Analysis Systems Research because there appeared some severe convergence problems. The modifications consisted of 'thinning out' the gid in the direction vertical to the surface by removing every other grid point.
From a calculation with a Cebeci Smith model. The equilibrium form of the JK model (JK7) is applied iteratively until the flow solution is converged. The Reynolds stress is then computed from - au (-Ill/)= Vt i)y 3. 4. eq). Now equations (JK1) through (JK3) are employed instead of (JK7) to compute the non-equilibrium eddy-viscosity and the maximum shear stress starting with (J = 1. Integration of equation (JK1 0) results also in a maximum shear stress which will be different in general. This difference can be made to vanish by the use of a.
H involves convective and, for viscous flows, diffusive components. The latter derive from the action of stress and heat conduction on the cell faces from both molecular 39 and turbulent action. The viscous terms are represented in full; thin-layer approximations are not used. ) of the external flow is fixed by a Reynolds number and its variation with temperature is determined from Sutherland's law. 4. 2. 7 describes the turbulent · contributions llt and ~ which are derived from a turbulence model.