Abstract:
It is known that mathematical modeling of twisted turbulent flows is a complex problem.
Research of such flows using direct modeling (DNS) methods or models of large vortices
(LES) requires large computational resources. And the numerical study of the two-phase
turbulent flow inside the centrifugal dust collector based on the mentioned methods is
practically impossible to date. Therefore, for the study of such flows, suitable mathematical models are turbulence models based on the closure of the Navier-Stokes equations
averaged by Reynolds (RANS). However, linear RANS models based on the Boussinesq
hypothesis are not suitable for solving such problems. The fact is that the Boussinesq hypothesis assumes isotropic turbulence, and in the case of rotating currents, anisotropic
turbulence occurs. With small swirls of flow, special corrections are introduced into
RANS linear models. With strong swirls of the flow, for example, as in centrifugal dust
collectors, these corrections may not be sufficient to obtain acceptable numerical solutions. Therefore, in such cases, it is recommended to use non-linear RANS models, for
example, based on Reynolds stresses. However, these models are very complex and
cumbersome for studying two-phase environments. Recently, a new two liquid model of
turbulence has appeared. This model has high accuracy and is easy to implement in solving practical problems. Therefore, the object of the present work is to numerically investigate the two-phase turbulent flow within the centrifugal dust collector based on the new
two liquid models. To verify the model, the obtained numerical results are compared with
experimental data. The paper also presents the results obtained from the SARC linear
model.
Fulltext:
PDF file (511 kB)