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2022 Vol.32, Issue 2 Preview Page

Original Article

Performance Evaluation of OGS-FLAC Simulator for Coupled Thermal-Hydrological-Mechanical Analysis

열-수리-역학적 연계해석을 위한 OGS-FLAC 시뮬레이터의 성능 평가

Dohyun Park1
,
Chan-Hee Park1*
박 도현1
,
박 찬희1*
1Principal Researcher, Deep Subsurface Storage and Disposal Research Center, Korea Institute of Geoscience and Mineral Resources
1한국지질자원연구원 심층처분환경연구센터 책임연구원
*Corresponding Author
30 April 2022. pp. 144-159
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Abstract

The present study developed a sequential approach-based numerical simulator for modeling coupled thermal-hydrological-mechanical (THM) processes in the ground and investigated the computational performance of the coupling analysis algorithm. The present sequential approach linked the two different solvers: an open-source numerical code, OpenGeoSys for solving the thermal and hydrological processes in porous media and a commercial code, FLAC3D for solving the geomechanical response of the ground. A benchmark test of the developed simulator was carried out using a THM problem where an analytical solution is given. The benchmark problem involves the coupled behavior (variations in temperature, pore pressure, stress, and deformation with time) of a fully saturated porous medium which is subject to a point heat source. The results of the analytical solution and numerical simulation were compared and the validity of the numerical simulator was investigated.

Keywords
Coupled thermal-hydrological-mechanical behavior
Sequential coupling analysis
Open-source simulator
Benchmark test
OGS-FLAC

본 연구에서는 지반의 열-수리-역학적 복합거동을 모델링하기 위한 순차적 접근법 기반의 시뮬레이터를 개발하고 적용된 연계해석 알고리즘의 계산성능을 분석하였다. 본 연구의 순차적 연계해석에서는 다공성 매질의 열 및 유체거동 분석을 위한 오픈소스 기반의 OpenGeoSys 수치코드와 역학해석을 위한 상용 소프트웨어 FLAC3D가 연동되었다. 해석해가 주어진 열-수리-역학적 복합거동 문제를 토대로 개발된 시뮬레이터에 대한 벤치마크 테스트가 수행되었다. 적용된 벤치마크 문제는 완전포화된 지반 내 점열원 작용 시 지반거동(시간에 따른 온도, 간극수압, 응력, 변형 변화)과 관계된다. 해석해와 수치해석 시뮬레이션 결과를 비교 분석하고 연계해석 시뮬레이터의 적정성을 조사하였다.

키워드
열-수리-역학적 복합거동
순차적 연계해석
오픈소스 시뮬레이터
벤치마크 테스트
OGS-FLAC
국문키워드2
국문키워드3
국문키워드4
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Information
  • Publisher :Korean Society for Rock Mechanics and Rock Engineering
  • Publisher(Ko) :한국암반공학회
  • Journal Title :Tunnel and Underground Space
  • Journal Title(Ko) :터널과 지하공간
  • Volume : 32
  • No :2
  • Pages :144-159
  • Received Date : 2022-04-04
  • Revised Date : 2022-04-22
  • Accepted Date : 2022-04-22
  • DOI :https://doi.org/10.7474/TUS.2022.32.2.144
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