A methodology for highly accurate results of direct numerical simulations: Drag force in dense gas–solid flows at intermediate Reynolds number
| العنوان: | A methodology for highly accurate results of direct numerical simulations: Drag force in dense gas–solid flows at intermediate Reynolds number |
|---|---|
| المؤلفون: | van der Ma Martin Hoef, Y Yali Tang, Eajf Frank Peters, Shl Sebastian Kriebitzsch, Jam Hans Kuipers |
| المساهمون: | Faculty of Science and Technology, Physics of Fluids, Multi-scale Modelling of Multi-phase Flows, Group Deen |
| المصدر: | International journal of multiphase flow, 62, 73-86. Elsevier International Journal of Multiphase Flow, 62, 73-86. Elsevier |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Fluid Flow and Transfer Processes, Physics, Mechanical Engineering, Resolution (electron density), Direct numerical simulation, General Physics and Astronomy, Reynolds number, Mechanics, Immersed boundary method, symbols.namesake, Classical mechanics, Drag, Convergence (routing), symbols, SPHERES, Limit (mathematics) |
| الوصف: | Simulations with an iterative immersed boundary method (IBM) are performed to predict the drag force for gas–solid flows at intermediate Reynolds number (Re). A methodology is developed to obtain highly accurate IBM results at relatively low computational cost. First of all, "resolution-free" gas–solid forces are estimated for a face-centered-cubic (FCC) array of monodisperse spheres in terms of the resolution convergence. This data is subsequently used to compute the relocation of the marker points, so as to correct for the resolution dependence of the simulated force on coarser grids. We then assume that the relocation derived from FCC arrays is also valid for the simulations of random arrays. As a result, the accurate gas–solid forces on random arrays can be obtained from the simulations at a relatively low resolution. We have applied this methodology to predict the gas–solid force at Re = 100 and 50, with ¿¿ varying from 0.1 up to the close-pack limit. The results are consistent with the recently published correlations. A new fit has been proposed for the interaction force at these two specific Reynolds numbers. This methodology makes it feasible to model the dense granular flows of large assemblies at high Re by direct numerical simulations at relatively low computational cost. Keywords : Direct numerical simulation; Immersed boundary method; Methodology; Gas–solid force; Resolution-free |
| اللغة: | English |
| تدمد: | 0301-9322 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8d2fb7e7c90f639218e2437e4ba5db6 https://research.utwente.nl/en/publications/456c6f45-dbd3-4e8c-a6ad-6c181446a84c |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....b8d2fb7e7c90f639218e2437e4ba5db6 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 03019322 |
|---|