NUMERICAL SIMULATION OF FLUID SEEPAGE AND HEAT TRANSFER IN AQUIFER WITH LBM-MFLS COUPLED MODEL

被引：0

作者：

Ma J. ^{[1
,2
]}

Lyu L. ^{[1
]}

Yang J. ^{[1
]}

Cui A. ^{[1
]}

Wei F. ^{[1
,2
]}

机构：

[1] College of Energy Safety Engineering, Tianjin Chengjian University, Tianjin

[2] Key Laboratory for Efficient Use of Low and Medium Grade Energy, Ministry of Education of China, Tianjin University, Tianjin

来源：

Taiyangneng Xuebao/Acta Energiae Solaris Sinica | 2023年 / 44卷 / 05期

关键词：

aquifers; geothermal energy; heat transfer; lattice Boltzmann method; numerical models; porous media;

D O I：

10.19912/j.0254-0096.tynxb.2021-1450

中图分类号：

学科分类号：

摘要：

Taking the multiple moving finite line heat sources（MFLS）operation mode as the research object，the unsteady state analytical solutions of the excess temperature in aquifer ΔTMFLS are obtained by applying space-time superposition principle，based upon the transient moving finite line heat source model. A calculation model coupled lattice Boltzmann method （LBM） and ΔTMFLS is established，according to introduce the discrete force source term into the Lattice Bhatnagar-Gross-Krook（LBGK）evolution equation of the velocity distribution function. The coupled model and the calculation method are validated by the data determined from the in-situ thermal re-sponse test. The results show that coupled LBM-ΔTMFLS simulation can well reproduce the evolution process of seepage velocity in aquifer which presents four successive stages of starting，declining，rising and stabilizing. With the decreasing of the porosity of aquifer，the movement space of virtual fluid particles reduces，consequently the collision probability of inter- particles and between particles and porous media increases，which leads to the kinetic energy loss enhancing，the descend range of seepage velocity increasing，and the recovery process retarding. While the inflow velocity increases，however，the influence degree of porosity on the hydrodynamic evolution of aquifer weakens. Meanwhile the directivity of the heat transport process in the aquifer enhances significantly. © 2023 Science Press. All rights reserved.

引用

页码：30 / 39

页数：9

共 21 条

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