Jongha Hwang
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Jongha Hwang has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Dong-Joo Min
Department of Energy Systems Engineering and the Research Institute of Energy and Resources, Seoul National University, Seoul, Republic of Korea
1 shared publication - Jun-Woo Lee
Geological Carbon Storage Research Center, Korea Institute of Geoscience and Mineral Resources , Daejeon, 34132
1 shared publication - Junyeong Heo
Mineral Exploration and Mining Research Centre Korea Institute of Geoscience and Mineral Resources (KIGAM) Daejeon South Korea
1 shared publication - Xiangyue Li
University Education Innovation Center Jungwon University Goesan Korea
1 shared publication
Latest Publications
- Open Access
- 31 December 2022
- Published by The Korean Society of Mineral and Energy Resources Engineers in Journal of the Korean Society of Mineral and Energy Resources Engineers
- Vol. 59 (6) , 656-672
Seismic Wave Modeling with an Improved Sponge Boundary Condition Considering Viscoelastic Behavior
The sponge boundary condition (SBC), an absorbing boundary condition, has not been discussed considerably; additionally, it has not been commonly used owing to its low applicability. Although the SBC is similar to the equation describing intrinsic attenuation in viscoelastic media, its behavior differs from the viscoelastic case. Herein, we present a new form of the SBC, which shows similarities with intrinsic attenuation. We describe the characteristics of the conventional and new SBCs with some numerical examples. By comparing the SBCs with the perfectly matched layer (PML) boundary condition, we found that the SBCs required broader damping areas than the PML to suppress artificial reflections; however, the SBCs could compensate for this deficiency with computational efficiency. The new SBC allows using variable-sized grids for damping areas, which substantially improves the performance of the SBC to be comparable to the PML while partially preserving computational efficiency.
- 31 December 2022
- Published by The Korean Society of Mineral and Energy Resources Engineers in Journal of the Korean Society of Mineral and Energy Resources Engineers
- Vol. 59 (6) , 656-672
Open AccessSeismic Wave Modeling with an Improved Sponge Boundary Condition Considering Viscoelastic Behavior
The sponge boundary condition (SBC), an absorbing boundary condition, has not been discussed considerably; additionally, it has not been commonly used owing to its low applicability. Although the SBC is similar to the equation describing intrinsic attenuation in viscoelastic media, its behavior differs from the viscoelastic case. Herein, we present a new form of the SBC, which shows similarities with intrinsic attenuation. We describe the characteristics of the conventional and new SBCs with some numerical examples. By comparing the SBCs with the perfectly matched layer (PML) boundary condition, we found that the SBCs required broader damping areas than the PML to suppress artificial reflections; however, the SBCs could compensate for this deficiency with computational efficiency. The new SBC allows using variable-sized grids for damping areas, which substantially improves the performance of the SBC to be comparable to the PML while partially preserving computational efficiency.