A unifying explanation for the damping of turbulence by additives or external forces. (English) Zbl 1405.76016
Summary: Recent calculations for the turbulent flow of a suspension of solid spheres in a gas were carried out by solving a Navier Stokes equation for the fluid that recognizes the presence of particles as external point forces. These show that a strong damping of the fluid turbulence can be realized at remarkably small volume fractions. The suggestion is made that the presence of point forces, pseudo-point forces, or added point shear stresses could provide a general explanation for turbulence suppression caused by additives or by the acceleration of a turbulent boundary-layer.
MSC:
| 76F10 | Shear flows and turbulence |
Keywords:
turbulence suppression; dilute suspension flows; polymer solutions; accelerating turbulent boundary-layers; point forces; added shear stressesReferences:
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