Fluid-particle drag force measurements from particle-resolved CFD simulations of flow past random arrays of ellipsoidal particles
| Autor: | Jennifer S. Curtis, Kevin E. Buettner, Avik Sarkar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Physics
Work (thermodynamics) business.industry Applied Mathematics General Chemical Engineering Flow (psychology) Reynolds number 02 engineering and technology General Chemistry Mechanics Computational fluid dynamics 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Physics::Fluid Dynamics symbols.namesake 020401 chemical engineering Drag Fluid dynamics symbols Particle 0204 chemical engineering Current (fluid) 0210 nano-technology business |
| Zdroj: | Chemical Engineering Science. 235:116469 |
| ISSN: | 0009-2509 |
| Popis: | The lack of constitutive drag laws for non-spherical particles represents a current gap in simulating fluid-particle flows, even though such non-spherical shapes are encountered in numerous applications. Some previous studies have applied spherical drag models to non-spherical particles, while others have used ad-hoc methods to account for particle shapes. However, the present work demonstrates the need to develop dedicated non-spherical drag laws, given the limitations of these previous ad-hoc approaches. In the present study, single-phase computational fluid dynamics (CFD) simulations of fluid flow over random arrays of ellipsoids are used to directly calculate the fluid-particle drag forces. By varying the particle shape, orientation, solid fraction, and fluid-flow velocity (Reynolds number), this work probes the variables that would be important for future model development. A preliminary non-spherical drag model is proposed based on the CFD results, which illustrates the functional dependency of the non-spherical drag on particle aspect ratio and orientation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect