Abstract
The flow fields of conical graupel of diameters 0.5–5mm falling in air of 800hPa and −20°C are studied by solving the relevant Navier–Stokes equations numerically using the ANSYS Fluent as the solver. The range of Reynolds numbers investigated in this study is from 20.12 to 1084.16. A steady state solution is obtained first and is perturbed by adding an instantaneous velocity perturbation. The flow solutions for the cases of 0.5, 1 and 2mm graupel return to steady state after a brief transient period. The solutions for 3, 4 and 5mm become unsteady with eddy shedding. The eddy shedding appears to become more turbulent for larger graupel. The characters of the flow fields are illustrated using the velocity, pressure distribution, and streamtrace fields. The computed drag coefficients are compared with that for spheres and disks of the same Reynolds number range and are found to be closer to spheres rather than disks.
Sign-in/Register to access full text options 
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.
