Simulation aux grandes échelles des lits fluidises circulants gaz-particule
Başlık çevirisi mevcut değil.
- Tez No: 400851
- Danışmanlar: PROF. OLIVIER SIMONIN, DR. PASCAL FEDE
- Tez Türü: Doktora
- Konular: Fizik ve Fizik Mühendisliği, Physics and Physics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2011
- Dil: Fransızca
- Üniversite: Institut National Polytechnique de Toulouse
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 160
Özet
Özet yok.
Özet (Çeviri)
Eulerian two fluid approach is generally used to simulate gas-solid flows in industrial circulating fluidized beds. Because of limitation of computational resources, simulations of large vessels are usually performed by using too coarse grid. Coarse grid simulations can not resolve fine flow scales which can play an important role in the dynamic behaviour of the beds. In particular, cancelling out the particle segregation effect of small scales leads to an inadequate modelling of the mean interfacial momentum transfer between phases and particulate shear stresses by secondary effect. Then, an appropriate modelling accounting for influences of unresolved structures has to be proposed for coarse-grid simulations. For this purpose, computational grids are refined to getmesh-independent result where statistical quantities do not change with further mesh refinement for a 3-D periodic circulating fluidized bed. The 3-D periodic circulating fluidized is a simple academic configuration where gas-solid flow conducted with A-type particles is periodically driven along the opposite direction of the gravity. The particulate momentumand agitation equations are filtered by the volume averaging and the importance of additional terms due to the averaging procedure are investigated by budget analyses using themesh independent result. Results show that the filtered momentum equation of phases can be computed on coarse grid simulations but sub-grid drift velocity due to the sub-grid correlation between the local fluid velocity and the local particle volume fraction and particulate sub-grid shear stresses must be taken into account. In this study, we propose functional and structural models for sub-grid drift velocity, written in terms of the difference between the gas velocity-solid volume fraction correlation and the multiplication of the filtered gas velocity with the filtered solid volume fraction. Particulate sub-grid shear stresses are closed by models proposed for single turbulent flows. Models? predictabilities are investigated by a priori tests and they are validated by coarse-grid simulations of 3-D periodic circulating, dense fluidized beds and experimental data of industrial scale circulating fluidized bed in manner of a posteriori tests.
Benzer Tezler
- CI-dragon-rov semi-autonome
CI-dragon-yarı otonom insansız su altı aracı
GÖNEN EREN
Yüksek Lisans
Fransızca
2007
Bilgisayar Mühendisliği Bilimleri-Bilgisayar ve KontrolGalatasaray ÜniversitesiBilgisayar Mühendisliği Ana Bilim Dalı
YRD. DOÇ. DR. S. MURAT EGİ
- Etude des politiques de planification de la production et de gestion des stocks dans l'environnement de re-fabrication
Yeniden üretim ortamında üretim planlama ve stok kontrol politikalarının incelenmesi
VOLKAN YAMAN
Yüksek Lisans
Fransızca
2005
Endüstri ve Endüstri MühendisliğiGalatasaray ÜniversitesiEndüstri Mühendisliği Ana Bilim Dalı
Y.DOÇ.DR. MÜJDE EROL GENEVOİS
- Le langage yawl dans le domaine de deroulement des operations et les extensions floues proposees
İş akışı modellemesinde yawl dili ve önerilen bulanık uzantılar
UFUK BAHÇECİ
Yüksek Lisans
Fransızca
2005
Endüstri ve Endüstri MühendisliğiGalatasaray ÜniversitesiEndüstri Mühendisliği Ana Bilim Dalı
DOÇ.DR. GÜLÇİN BÜYÜKÖZKAN
- The impact of sanctions and pre¬release policies on recidivism
Afların ve yaptırımların tekrar suç işleme oranları üzerine etkisi
MEHMET BARAN DİŞPENÇE
Yüksek Lisans
İngilizce
2022
EkonomiGalatasaray ÜniversitesiEkonomi Ana Bilim Dalı
DOÇ. DR. BİLGE ÖZTÜRK GÖKTUNA
- La solution proposee par revonsuo concernant le probleme difficile de la conscience
Bilincin zor problemi hakkında revonsuo tarafından önerilen çözüm
HATİCE GÜLAY EROL
Yüksek Lisans
Fransızca
2023
FelsefeGalatasaray ÜniversitesiFelsefe Ana Bilim Dalı
DOÇ. DR. SELAMİ ATAKAN ALTINÖRS