Discrete element method: Difference between revisions

Revision as of 10:48, 25 April 2022

Revision as of 10:09, 26 April 2022

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==Thermal DEM==

The discrete element method is widely applied for the consideration of mechanical interactions in many-body problems, particularly granular materials. Among the various extensions to DEM, the consideration of heat flow is particularly useful. Generally speaking in Thermal DEM methods, the thermo-mechanical coupling is considered, whereby the thermal properties of an individual element are considered in order to model heat flow through a macroscopic granular or multi-element medium subject to a mechanical loading .<ref>[https://arxiv.org/abs/1406.4199 Thermal DEM of pebble bed] Fusion Science and Technology </ref>. Interparticle forces, computed as a part of classical DEM, are used to determined areas of true interparticle contact and thus model the conductive transfer of heat from one solid element to another. A further aspect that is considered in DEM is the gas phase conduction, radiation and convection of heat in the interparticle spaces. To facilitate this, properties of the inter-element gaseous phase need to be considered in terms of pressure, gas conductivity and the mean-free path of gas molecules. <ref>[https://www.sciencedirect.com/science/article/pii/S0032591013002702 Thermal DEM] Journal of Powder Technolgoy </ref>

==Long-range forces==