CALIBRATION OF CONTACT PARAMETERS OF STRAW BIOCHAR BASED ON DISCRETE ELEMENT METHOD

Zhang Yawen; Ren Dezhi; Gong Yuanjuan; Li Jiaqi; Cheng Huiting; Zhang Luji

doi:10.19912/j.0254-0096.tynxb.2021-0177

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Acta Energiae Solaris Sinica ›› 2022, Vol. 43 ›› Issue (11) : 345-351. DOI: 10.19912/j.0254-0096.tynxb.2021-0177

CALIBRATION OF CONTACT PARAMETERS OF STRAW BIOCHAR BASED ON DISCRETE ELEMENT METHOD

Zhang Yawen, Ren Dezhi, Gong Yuanjuan, Li Jiaqi, Cheng Huiting, Zhang Luji

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Abstract

In order to obtain the discrete element simulation parameters of straw biochar,the contact parameters of biochar are calibrated by combining simulation analysis with physical experiment. The Placket-Burman test is used to screen out the biochar discrete element significant influence parameters and the steepest climb test is used to determine the optimal interval of the significant parameters, as well as the Box-Behnken test is applied to determine the three significant parameters, the tests results shows that the values of significant parameters for charcoal-charcoal rolling friction coefficients, surface energy JKR （J/m²）and charcoal-steel rolling friction coefficient are 0.097, 0.018, and 0.256 respectively. The comparison of Rocky simulation results and the stacking angle test points out that the error of the specified parameters is 2.33%, which meets the setting requirements of the simulation analysis parameters.

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constitutive models / discrete element method / experimental design / biochar / parameter calibration

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Zhang Yawen, Ren Dezhi, Gong Yuanjuan, Li Jiaqi, Cheng Huiting, Zhang Luji. CALIBRATION OF CONTACT PARAMETERS OF STRAW BIOCHAR BASED ON DISCRETE ELEMENT METHOD[J]. Acta Energiae Solaris Sinica. 2022, 43(11): 345-351 https://doi.org/10.19912/j.0254-0096.tynxb.2021-0177

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