File Download
There are no files associated with this item.
Supplementary
-
Citations:
- Appears in Collections:
Conference Paper: Cross-scale dynamic interactions in compacting porous geomaterials as a trigger to instabilities
Title | Cross-scale dynamic interactions in compacting porous geomaterials as a trigger to instabilities |
---|---|
Authors | |
Issue Date | 2022 |
Citation | 12th International Workshop on Bifurcation and Degradation in Geomaterials How to Cite? |
Abstract | We present an approach to model material bifurcations derived from the dynamic interplay of at least two coupled reaction-diffusion processes dur-ing compaction of porous media. Our new approach introduces nonlocal terms that describe the coupling between scales through mutual cross-diffusivities and regularize the ill-posedness of the reaction-self-diffusion system. Applying bifurcation theory, we suggest that geological patterns can be interpreted as physical representations of two classes of well-known instabilities, i.e., Turing instability, Hopf bifurcation, and a new class of complex soliton-like waves. The new class appears for small fluid release reactions rates which may, with negligible self-diffusion, lead to an extreme focusing of wave intensity into a short sharp earthquake-like event. Here we investigate the phenomenon of episodic tremor and slip instability of time-periodic slip events recorded in subduction zones. It is shown that the instability is a Hopf bifurcation and our inversion of the recorded events conclusively shows that episodic fluid release from serpentinite dehydra-tion is the cause for the sudden slip events as postulated earlier. Our analy-sis further allows derivation of chemical reaction rates under geodynamic loading conditions opening the path for physics/chemistry-based forecast-ing of catastrophic instabilities in nature. |
Persistent Identifier | http://hdl.handle.net/10722/319771 |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | SUN, Q | - |
dc.contributor.author | Hu, M | - |
dc.contributor.author | Regenauer-Lieb, K | - |
dc.date.accessioned | 2022-10-14T05:19:27Z | - |
dc.date.available | 2022-10-14T05:19:27Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | 12th International Workshop on Bifurcation and Degradation in Geomaterials | - |
dc.identifier.uri | http://hdl.handle.net/10722/319771 | - |
dc.description.abstract | We present an approach to model material bifurcations derived from the dynamic interplay of at least two coupled reaction-diffusion processes dur-ing compaction of porous media. Our new approach introduces nonlocal terms that describe the coupling between scales through mutual cross-diffusivities and regularize the ill-posedness of the reaction-self-diffusion system. Applying bifurcation theory, we suggest that geological patterns can be interpreted as physical representations of two classes of well-known instabilities, i.e., Turing instability, Hopf bifurcation, and a new class of complex soliton-like waves. The new class appears for small fluid release reactions rates which may, with negligible self-diffusion, lead to an extreme focusing of wave intensity into a short sharp earthquake-like event. Here we investigate the phenomenon of episodic tremor and slip instability of time-periodic slip events recorded in subduction zones. It is shown that the instability is a Hopf bifurcation and our inversion of the recorded events conclusively shows that episodic fluid release from serpentinite dehydra-tion is the cause for the sudden slip events as postulated earlier. Our analy-sis further allows derivation of chemical reaction rates under geodynamic loading conditions opening the path for physics/chemistry-based forecast-ing of catastrophic instabilities in nature. | - |
dc.language | eng | - |
dc.relation.ispartof | 12th International Workshop on Bifurcation and Degradation in Geomaterials | - |
dc.title | Cross-scale dynamic interactions in compacting porous geomaterials as a trigger to instabilities | - |
dc.type | Conference_Paper | - |
dc.identifier.email | Hu, M: mmhu@hku.hk | - |
dc.identifier.authority | Hu, M=rp02544 | - |
dc.identifier.hkuros | 339491 | - |