Journal
AICHE JOURNAL
Volume 62, Issue 12, Pages 4526-4535Publisher
WILEY-BLACKWELL
DOI: 10.1002/aic.15331
Keywords
heat conduction; discrete element method; soft-sphere contact models
Categories
Funding
- DOE BRIDGE program [DE-EE0005954]
- SunShot initiative
- Office of Science of the Department of Energy through the Advanced Leadership Computing [DE-AC05-00OR22725]
- National Science Foundation [CNS-0821794]
- University of Colorado Boulder
- University of Colorado Denver
- National Center for Atmospheric Research
Ask authors/readers for more resources
Conductive heat transfer to flowing particles occurs when two particles (or a particle and wall) come into contact. The direct conduction between the two bodies depends on the collision dynamics, namely the size of the contact area and the duration of contact. For soft-sphere discrete-particle simulations, it is computationally expensive to resolve the true collision time because doing so would require a restrictively small numerical time step. To improve the computational speed, it is common to increase the softness of the material to artificially increase the collision time, but doing so affects the heat transfer. In this work, two physically-based correction terms are derived to compensate for the increased contact area and time stemming from artificial particle softening. By including both correction terms, the impact that artificial softening has on the conductive heat transfer is removed, thus enabling simulations at greatly reduced computational times without sacrificing physical accuracy. (c) 2016 American Institute of Chemical Engineers AIChE J, 62: 4526-4535, 2016
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available