Heat transfer modelling in Discrete Element Method (DEM)-based simulations of thermal processes: Theory and model development

Peng, Zhengbiao; Doroodchi, Elham; Moghtaderi, Behdad

doi:10.1016/j.pecs.2020.100847

Cited by 107 publications

(31 citation statements)

References 167 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…k eff had an inverse proportionality with porosity for all the samples. The same trend was reported in previous studies on sand and gravel materials [28,45]. Comparing the samples showed that RAP3 with 73% of gravel content had the highest k eff .…”

Section: Resultssupporting

confidence: 88%

“…9) equations using pressure-based algorithms like SIMPLE in OpenFOAM will lead to calculating pressure field (P) and velocity vector (U i ) and consequently the kinetic energy (K). Then, the temperature vector (T i ) could be calculated from the conservation of the VicRoads_Lower (RCA3) [45] RAP1 ASTM_Upper (RAP2) [46] ASTM_Lower (RAP3) [46] Fig. 4 Particle size distribution of RCA and RAP samples internal energy equation (Eq.…”

Section: Heat Transfer Formulation In Dem and Cfdmentioning

confidence: 99%

“…Recently, the idealized spherical and elliptical shape of particles has been used to simulate granular assemblies by discrete element method (DEM) [45]. Numerous studies have questioned the reliability of these models in assemblies with polyhedron-shaped particles [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

et al. 2021

View full text Add to dashboard Cite

This paper studies the effect of various parameters on the effective thermal conductivity (k eff ) of the geothermal pavement system when constructed using construction and demolition (C&D) materials. Recycled asphalt pavement (RAP) and recycled concrete aggregates (RCA) were utilized to experimentally model the geothermal pavement system, consisting of copper tubes to circulate water in the pavement and harness thermal energy. Numerical computational fluid dynamics (CFD) and discrete element method (DEM) methods were used to simulate the geothermal pavement system. Six samples of RAP and RCA aggregates with different particle size distributions were utilized to study the effect of important parameters in the geothermal pavement system. According to the results, coupled CFD-DEM approach could simulate the heat transfer mechanism in geothermal pavement compared to the results of the CFD simulation. The results indicated that increasing porosity would decrease k eff . The decrease rate depended on the gravel content of the sample where samples with a higher gravel content experienced a higher rate of decrease. Also, simulation results showed that increasing the gravel content could increase the value of k eff . Increasing the axial stress resulted in an increase in the value of coordination number (CN) and k eff . Moreover, comparing the thermal power and contact distributions indicated that the morphology of the heat conduction was the same as the contact network distribution. To study the effect of the particle shape on k eff , a novel approach was used that comprised of 3D scanning and printing real particle shape of RCA aggregates by thermochromic material. Simulated assemblies with DEM were verified using 3D printed particles. The effect of aspect ratio (AR) on k eff was studied which indicated that increasing AR would increase k eff . Decreasing AR to one, on the other hand, increased the time needed to reach the steady state.

show abstract

Section: Resultssupporting

confidence: 88%

Section: Heat Transfer Formulation In Dem and Cfdmentioning

confidence: 99%

See 1 more Smart Citation

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

et al. 2021

View full text Add to dashboard Cite

show abstract

“…e fluid-structure coupling simulation of the rapid closing jet mechanism of pistol shrimps' claws can reduce the limitation of the measurement technology by the uncontrollable movement of live shrimp and it is conducive to systematic and reproducible research. Refer to the reference using CFD method to solve practical engineering problems [21,22] and the reference on the application of dynamic grid technology in actual engineering problems [23]; based on the cavitation theory and fluid-structure coupling theory, this paper uses the finite volume method software Fluent to construct a model about the seawater contact with the claws and a seawater cavitation model. Carry out a simulation of the claw closure under different working conditions.…”

Section: Introductionmentioning

confidence: 99%

Research on the Rapid Closing Jet Mechanism of Pistol Shrimp’s Claws Based on Fluid Dynamic Grid

Wei

Quan

Cao

et al. 2021

Mathematical Problems in Engineering

View full text Add to dashboard Cite

The predation behavior of the pistol shrimp is extremely special, and the predation process will produce a huge popping sound, which has caused extensive research by scholars from all over the world. This article carried out a study on the rapid closing jet mechanism of pistol shrimp’s claws. A theoretical model, based on the hydrodynamic characteristics of seawater and the theory of fluid-structure coupling, was proposed for the interaction between the claws and seawater. A simulation model was established using the finite volume software Fluent, and the rapid closing jet mechanism of pistol shrimp’s claws was verified by using fluid dynamic grid. This article studied the influence of different fluid models on the simulation results. The effects of the claws’ closing angular velocity and angular acceleration on the interaction between the claws and seawater were analyzed, which provides a theoretical basis for the development of new underwater kinetic energy weapons.

show abstract

“…Rotary dryers are the most commonly used devices for the pretreatment of wet biomass particles because of their strong maneuverability and large capacity. [20][21][22] It is well known that a rotary drum normally consists of a long cylindrical drum and a number of baffles within it.…”

Section: Introductionmentioning

confidence: 99%

Effect of baffle structure on the dynamic transportation behavior of s‐liked biomass fuels in a rotating drum

Fan

Pan

et al. 2020

Energy Science & Engineering

View full text Add to dashboard Cite

Biomass energy is one of the potential renewable energy sources in the world. As the most common biomass materials, plants, wood, and waste are familiar to people and widely used in a broad range of industries. [1][2][3][4][5] Biomass materials like wood and plants are supposed to be converted into suitable forms of energy through direct combustion, which can be grown energy crops, forest residues, food processing, horticulture, or human waste from sewage plants. Meanwhile, fuel and electricity are the most useful energy forms. Therefore, researchers are attempting to develop more efficient ways to use biomass as fuel and produce more biomass materials for energy production. Over the past decades, biomass energy has been considered to be modernized and popular. However, the high moisture content of fresh biomass materials can decrease the energy efficiency of the conversion process and increase the emission of pollutants.

show abstract

Heat transfer modelling in Discrete Element Method (DEM)-based simulations of thermal processes: Theory and model development

Cited by 107 publications

References 167 publications

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

Evaluating the effective thermal conductivity of geothermal pavements constructed using demolition wastes by DEM and 3D printing techniques

Research on the Rapid Closing Jet Mechanism of Pistol Shrimp’s Claws Based on Fluid Dynamic Grid

Effect of baffle structure on the dynamic transportation behavior of s‐liked biomass fuels in a rotating drum

Contact Info

Product

Resources

About