Abstract
Abstract The problem of predicting the orientations of falling nonspherical particles has been addressed by the construction of a heuristic model that assumes the particles are subject to isotropic turbulence within or below the inertial subrange, that is, the Kolmogorov spectrum of eddies, depending on the particle dimensions. The rms tilt angle of a spheroidal particle of small eccentricity is determined by Langevin-type averaging over its equation of motion, taking into account the first-order restoring torque that arises when the stable fall mode is perturbed by either thermal or turbulent fluctuations. By invoking dimensional constraints concerning the nature of the main flow and turbulent stresses and by assuming the thermal and turbulent fluctuations are uncorrelated, an approximate expression for the variance of an assumed Gaussian orientation distribution for small tilt angles and small flow Reynolds numbers is obtained. The expression is then generalized to provide a semiquantitative, nearly Gau...
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
