Superstructures and heat transport in large-scale convection systems in large-scale convection systems

Yik, Hiufai

dc.contributor.advisor	Stephan, Weiss Dr.
dc.contributor.author	Yik, Hiufai
dc.date.accessioned	2025-02-17T16:07:57Z
dc.date.available	2025-02-24T00:50:05Z
dc.date.issued	2025-02-17
dc.identifier.uri	http://resolver.sub.uni-goettingen.de/purl?ediss-11858/15830
dc.identifier.uri	http://dx.doi.org/10.53846/goediss-11106
dc.format.extent	104	de
dc.language.iso	eng	de
dc.rights.uri	http://creativecommons.org/licenses/by/4.0/
dc.subject.ddc	530	de
dc.title	Superstructures and heat transport in large-scale convection systems in large-scale convection systems	de
dc.type	doctoralThesis	de
dc.contributor.referee	Stephan, Weiss Dr.
dc.date.examination	2024-02-16	de
dc.subject.gok	Physik (PPN621336750)	de
dc.description.abstracteng	This thesis conducts a comprehensive investigation of Rayleigh-Bénard convection experimental and numerically in a rectangular cell, characterized by an aspect ratio of 5, exploring a wide range of Rayleigh numbers ($\Ra$) up to $10^{13}$ and Prandtl numbers ($\Pr$) from 0.79 to 0.92. The study delves into the spatial scaling of convection, particularly within the plume emitting and ejecting regions, at these high $\Ra$ values. Contrary to 2D predictions, our findings indicate no crossover in heat flux scaling between these regions. Notably, the Large Scale Circulation (LSC) in a 3D context exhibits multiple stable states within the same system. We also found LSC grow with $\Ra$, a significant deviation from 2D models. Additionally, the study reveals hysteresis behavior in the roll structures in extended geometry at both low and high $\Ra$. These findings contribute to a deeper understanding of turbulent convection, challenging existing theories and highlighting the complexity of high $\Ra$ fluid dynamics.	de
dc.contributor.coReferee	Tilgner, Andreas Prof. Dr.
dc.subject.eng	Heat Transfer	de
dc.subject.eng	Convection	de
dc.subject.eng	Turbulence	de
dc.subject.eng	Pattern Formation	de
dc.identifier.urn	urn:nbn:de:gbv:7-ediss-15830-2
dc.affiliation.institute	Fakultät für Physik	de
dc.description.embargoed	2025-02-24	de
dc.identifier.ppn	1917543441
dc.notes.confirmationsent	Confirmation sent 2025-02-17T19:45:01	de

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