The aim of this thesis Experimental studies on dispersion processes in periodic flows is to study the hydrodynamics and asses the mixing properties of periodic flows, through extensive experimental campaigns. With mixing, we refer to the field of environmental fluid mechanic that seeks to provide tools to assess the flow of nutrients needed for the survival of an ecosystem, limit toxic pollutants and minimize the anthropic impact. Over the last twenty years, a lot of literature had been devoted to asses mixing processes occurring in uniform flows but less on periodic ones. A periodic flow is an oscillatory flow whose characteristics assume the same sequence of values exactly after a fixed length of time, known as the period. These repetitive velocity patterns produce in the hydrodynamics a periodical occurrence and, eventually, destruction of flow structures responsible for the dispersion or the entrainment of pollutants/ nutrients within the domain considered. Coastal areas provide a typical example of regions dominated by period flows, such as those induced by tidal currents and sea waves. These areas are also characterised by a massive human development, and biodiverse ecosystems, making the study of the mixing of paramount importance for their sustainment and preservation.

Experimental studies on dispersion processes in periodic flows

DE LEO, ANNALISA
2022-04-14

Abstract

The aim of this thesis Experimental studies on dispersion processes in periodic flows is to study the hydrodynamics and asses the mixing properties of periodic flows, through extensive experimental campaigns. With mixing, we refer to the field of environmental fluid mechanic that seeks to provide tools to assess the flow of nutrients needed for the survival of an ecosystem, limit toxic pollutants and minimize the anthropic impact. Over the last twenty years, a lot of literature had been devoted to asses mixing processes occurring in uniform flows but less on periodic ones. A periodic flow is an oscillatory flow whose characteristics assume the same sequence of values exactly after a fixed length of time, known as the period. These repetitive velocity patterns produce in the hydrodynamics a periodical occurrence and, eventually, destruction of flow structures responsible for the dispersion or the entrainment of pollutants/ nutrients within the domain considered. Coastal areas provide a typical example of regions dominated by period flows, such as those induced by tidal currents and sea waves. These areas are also characterised by a massive human development, and biodiverse ecosystems, making the study of the mixing of paramount importance for their sustainment and preservation.
14-apr-2022
File in questo prodotto:
File Dimensione Formato  
phdunige_4704438_1.pdf

accesso aperto

Descrizione: Experimental studies to asses the mixing properties of periodic flows. With 'mixing', we refer to the field of environmental fluid mechanic that seeks to provide tools to assess the flow of nutrients needed for the survival of an ecosystem, limit toxic pollutants and minimize the anthropic impact. Over the last twenty years, a lot of literature had been devoted to asses mixing processes occurring in uniform flows but less on periodic ones. A periodic flow is an oscillatory flow whose characteristics assume the same sequence of values exactly after a fixed length of time, known as the period. These repetitive velocity patterns produce in the hydrodynamics a periodical occurrence and, eventually, destruction of flow structures responsible for the dispersion or the entrainment of pollutants/ nutrients within the domain considered. Coastal areas provide a typical example of regions dominated by period flows, such as those induced by tidal currents and sea waves.
Tipologia: Tesi di dottorato
Dimensione 323.18 kB
Formato Adobe PDF
323.18 kB Adobe PDF Visualizza/Apri
phdunige_4704438_2.pdf

accesso aperto

Tipologia: Tesi di dottorato
Dimensione 8.01 MB
Formato Adobe PDF
8.01 MB Adobe PDF Visualizza/Apri
phdunige_4704438_3.pdf

accesso aperto

Tipologia: Tesi di dottorato
Dimensione 17.37 MB
Formato Adobe PDF
17.37 MB Adobe PDF Visualizza/Apri
phdunige_4704438_4.pdf

accesso aperto

Tipologia: Tesi di dottorato
Dimensione 11.87 MB
Formato Adobe PDF
11.87 MB Adobe PDF Visualizza/Apri
phdunige_4704438_5.pdf

accesso aperto

Tipologia: Tesi di dottorato
Dimensione 4.78 MB
Formato Adobe PDF
4.78 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11567/1075035
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact