Experimental investigation of heat generation during granular flow in a rotating drum using infrared thermography

Granular flow is common in many industrial applications, and involves heat generation from frictional contacts and inelastic collisions between particles. The self-heating process is still poorly understood despite being intrinsic to many processes. This work, for the first time, explores this problem experimentally by quantifying the temperature rise of granular flows in a rotating drum with a robust methodology based on infrared thermography. Particles of four different materials (lead, steel, plastic and glass) are used in the experiments, at various rotation speeds and drum fill ratios. To assess the mechanical behaviour, the flow regime of every experiment was determined. It was inferred that particles with higher density tend to generate more heat. It was also revealed that increasing the rotation speed favours the temperature rise. At the same time, the fill ratio had the least influence on the thermal response of the particulate systems considered.his project is funded through Marie SKŁODOWSKA-CURIE Innovative Training Network MATHEGRAM, the People Programme (Marie SKŁODOWSKA-CURIE Actions) of the European Union's Horizon 2020 Programme H2020 under REA grant agreement No. 813202. Dr. Franci acknowledges the support from MCIN/AEI/10.13039/501100011033 and FEDER Una manera de hacer Europa for funding his work via project PID2021-122676NB-I00. Prof. Oñate acknowledges the Severo Ochoa Programme through the Grant CEX2018-000797-S funded by MCIN/AEI/10.13039/501100011033.Peer ReviewedPostprint (published version

FEM data sets for heat generation due to plastic deformation and the and associated contact temperature during a normal impact between an elastic-perfectly-plastic particle and a rigid surface.

<p>This dataset contains essential data from the Finite Element Method (FEM) model predicting heat generation due to plastic deformation during the normal impact of a deformable spherical particle and a rigid flat substrate. Part of this data was processed and featured in a publication of a journal article (https://doi.org/10.1016/j.ijimpeng.2023.104831). The following is the description of the data files and the associated figures in the original paper. </p><p>'Energy_Vy200_1200 .xlsx' and 'Temp_Vy200_1200 .xlsx' -  data for the evolution of heat and nodal temperature, respectively for varying impact velocities. Data was used for Figs.5 -7 in the published paper.</p><p>'Energy_YM_5_1000.xlsx' and 'Temp_YM_5_1000.xlsx' - data for the evolution of heat and nodal temperature, respectively for varying Young moduli. Data was used for Figs. 8 and 9 in the published paper.</p><p>'Energy_YS_50_800.xlsx' , 'Temp_YS_50_800.xlsx' - data for the evolution of heat and nodal temperature, respectively for varying yield strengths. Data was used for Figs. 10 and 11 in the published paper.</p><p>'Energy_Den_500_8000.xlsx' , 'TempC_Den_500_8000.xlsx'- data for the evolution of heat and nodal temperature, respectively for varying densities. Data was used for Figs. 12 and 13 in the published paper.</p><p>'Temp_TC.xlsx' , 'Temp_HC.xlsx' - data for the evolution of nodal temperatures for varying thermal conductivity and specific heat capacities, respectively. Data was used for Figs.  14 -17 in the published paper.</p><p> </p><p> </p><p> </p><p> </p><p> </p&gt

Friction-induced heat generation between two particles

Friction-induced heat generation, dissipation and the associated rise in temperature are still an intrinsic problem in many fields dealing with granular materials. This work presents preliminary attempts of modelling heat generation and estimating the contact flash temperatures with the use of a theoretical model. To check the robustness of this theoretical model simulations were run in parallel with Finite element method. The maximum contact temperatures obtained from the theoretical model show a good agreement with FEM results. The promising results imply that the simple theoretical model can be used accurately to predict heat generation in granular materials

Friction-induced heat generation between two particles

Friction-induced heat generation, dissipation and the associated rise in temperature are still an intrinsic problem in many fields dealing with granular materials. This work presents preliminary attempts of modelling heat generation and estimating the contact flash temperatures with the use of a theoretical model. To check the robustness of this theoretical model simulations were run in parallel with Finite element method. The maximum contact temperatures obtained from the theoretical model show a good agreement with FEM results. The promising results imply that the simple theoretical model can be used accurately to predict heat generation in granular materials

Experimental investigation of heat generation during granular flow in a rotating drum using infrared thermography

Granular flow is common in many industrial applications, and involves heat generation from frictional contacts and inelastic collisions between particles. The self-heating process is still poorly understood despite being intrinsic to many processes. This work, for the first time, explores this problem experimentally by quantifying the temperature rise of granular flows in a rotating drum with a robust methodology based on infrared thermography. Particles of four different materials (lead, steel, plastic and glass) are used in the experiments, at various rotation speeds and drum fill ratios. To assess the mechanical behaviour, the flow regime of every experiment was determined. It was inferred that particles with higher density tend to generate more heat. It was also revealed that increasing the rotation speed favours the temperature rise. At the same time, the fill ratio had the least influence on the thermal response of the particulate systems considered

Dataset of the temperature rise during granular flows in a rotating drum

This paper provides experimental data on the temperature rise during granular flows in a small-scale rotating drum due to heat generation. All heat is believed to be generated by conversion of some mechanical energy, through mechanisms such as friction and collisions between particles and between particles and walls. Particles of different material types were used, while multiple rotation speeds were considered, and the drum was filled with different amounts of particles. The temperature of the granular materials inside the rotating drum was monitored using a thermal camera. The temperature increases at specific times of each experiment are presented in form of tables, along with the average and standard deviation of the repetitions of each setup configuration. The data can be used as a reference to set the operating conditions of rotating drums, in addition to calibrating numerical models and validating computer simulations

Dataset of the temperature rise during granular flows in a rotating drum

This paper provides experimental data on the temperature rise during granular flows in a small-scale rotating drum due to heat generation. All heat is believed to be generated by conversion of some mechanical energy, through mechanisms such as friction and collisions between particles and between particles and walls. Particles of different material types were used, while multiple rotation speeds were considered, and the drum was filled with different amounts of particles. The temperature of the granular materials inside the rotating drum was monitored using a thermal camera. The temperature increases at specific times of each experiment are presented in form of tables, along with the average and standard deviation of the repetitions of each setup configuration. The data can be used as a reference to set the operating conditions of rotating drums, in addition to calibrating numerical models and validating computer simulations

Experimental and numerical study of heat generation by energy dissipation in a rotating drum filled with particulate material

This work aims to investigate the generation of heat by dissipation of mechanical energy in particulate flows. The behavior of material in a rotating drum is considered in experimental and numerical analyses. In the physical experiments, the temperature of the particles inside the drum was monitored by means of infrared thermography and the influence of rotation speed and filling ratio was explored. The experimental data were later used to calibrate numerical simulations using the Discrete Element Method (DEM). The numerical results were then analyzed to gain more insights into the mechanisms of heat generation.This project is funded by the Marie SKŁODOWSKA-CURIE Innovative Training Network MATHEGRAM, the People Programme (Marie SKŁODOWSKA-CURIE Actions) of the European Union’s Horizon 2020 Programme H2020 under REA grant agreement No. 813202.Postprint (published version