A drag coefficient model for Lagrangian particle dynamics relevant to high-speed flows
نویسندگان
چکیده
A blended drag coefficient model is constructed using a series of empirical relations based on Reynolds number, Mach and Knudsen number. When validated against experiments, the produces matching values with standard deviation error 2.84% maximum 11.87%. The used in Lagrangian code which coupled to hypersonic aerothermodynamic CFD code, particle velocity trajectory are experimental results. comparative results agree well show that new capable predicting motion accurately over range
منابع مشابه
Unsteady effects in dense, high speed, particle laden flows
0301-9322/$ see front matter 2014 Elsevier Ltd. All rights reserved. http://dx.doi.org/10.1016/j.ijmultiphaseflow.2013.12.007 ⇑ Corresponding author. Tel.: +1 515 294 1614; fax: +1 515 294 3262. E-mail addresses: [email protected] (J.D. Regele), jason.rabinovitch@caltech. edu (J. Rabinovitch), [email protected] (T. Colonius), [email protected] (G. Blanquart). J.D. Regele a,⇑, J. Rabi...
متن کاملStudy of Parameters Affecting Separation Bubble Size in High Speed Flows using k-ω Turbulence Model
Shock waves generated at different parts of vehicle interact with the boundary layer over the surface at high Mach flows. The adverse pressure gradient across strong shock wave causes the flow to separate and peak loads are generated at separation and reattachment points. The size of separation bubble in the shock boundary layer interaction flows depends on various parameters. Reynolds-averaged...
متن کاملNumerical Investigation on the Effect of Tunnel Height on Drag Reduction in a High Speed Trimaran
There are different methods to reduce drag in high speed hulls. One of these methods is a change in the shape of the body by adding longitudinal side tunnels. In this paper it has been attempted to determine the influence of the tunnel height on hydrodynamic characteristics of the hull to achieving an optimum shape for the tunnel. To achieve this purpose, numerical simulation of the problem has...
متن کاملApplication of Particle Image Velocimetry to High-Speed Supersonic Flows in a Shock Tunnel
Particle Image Velocimetry (PIV) has become an important tool in modern flowfield diagnostics, in particular for subsonic flows. PIV systems have also been used to measure supersonic flows in supersonic wind tunnels, but only recently it has been shown that PIV can also be a valuable tool for high-speed supersonic flows in a shock tunnel (Haertig et al., 2001). At the ISL shock tunnel a PIV sys...
متن کاملArbitrary Lagrangian-Eulerian methods for modelling high speed multi-material flows
Arbitrary Lagrangian Eulerian methods are well suited to modelling high speed compressible multimaterial flow problems in complex geometry. In this talk three stage ALE schemes will be considered, which are typically used for practical calculations of multimaterial flows. These three stages are: a Lagrangian stage, in which the solution and the computational mesh are updated; a rezoning stage, ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: International Journal of Heat and Fluid Flow
سال: 2021
ISSN: ['1879-2278', '0142-727X']
DOI: https://doi.org/10.1016/j.ijheatfluidflow.2020.108706