Multiscale modeling and simulation of turbulent geophysical flows
Başlık çevirisi mevcut değil.
- Tez No: 400813
- Danışmanlar: DR. ANNE E. STAPLES
- Tez Türü: Doktora
- Konular: Makine Mühendisliği, Mechanical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2012
- Dil: İngilizce
- Üniversite: Vırgınıa Polytechnıc Instıtute And State Unıversıty
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Mekanik Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: Belirtilmemiş.
Özet
Özet yok.
Özet (Çeviri)
The accurate and e cient numerical simulation of geophysical ows is of great interest in numerical weather prediction and climate modeling as well as in numerous critical areas and industries, such as agriculture, construction, tourism, transportation, weather-related disaster management, and sustainable energy technologies. Oceanic and atmospheric ows display an enormous range of temporal and spatial scales, from seconds to decades and from centimeters to thousands of kilometers, respectively. Scale interactions, both spatial and temporal, are the dominant feature of all aspects of general circulation models in geophysical uid dynamics. In this thesis, to decrease the cost for these geophysical ow computations, several types of multiscale methods were systematically developed and tested for a variety of physical settings including barotropic and strati ed wind-driven large scale ocean circulation models, decaying and forced two-dimensional turbulence simulations, as well as several benchmark incompressible ow problems in two and three dimensions. The new models proposed here are based on two classes of modern multiscale methods: (i) interpolation based approaches in the context of the multigrid/multiresolution methodologies, and (ii) deconvolution based spatial ltering approaches in the context of large eddy simulation techniques. In the rst case, we developed a coarse-grid projection method that uses simple interpolation schemes to go between the two components of the problem, in which the solution algorithms have di erent levels of complexity. In the second case, the use of approximate deconvolution closure modeling strategies was implemented for large eddy simulations of large-scale turbulent geophysical ows. The numerical assessment of these approaches showed that both the coarse-grid projection and approximate deconvolution methods could represent viable tools for computing more realistic turbulent geophysical ows that provide signi cant increases in accuracy and computational e ciency over conventional methods.
Benzer Tezler
- Development of a lattice boltzmann based flow solver for large eddy simulation of turbulent flows
Türbülanslı akışların büyük girdap benzetimi için lattice boltzmann temelli akış çözücüsü geliştirilmesi
ALİHAN ATİLLA ÇINAR
Yüksek Lisans
İngilizce
2025
İstanbul Teknik ÜniversitesiUçak ve Uzay Mühendisliği Ana Bilim Dalı
Yükleniyor...
- Hangar kenar modifikasyonu ile basitleştirilmiş fırkateyn modeli hava izinin iyileştirilmesi
Improvement of ship airwake of a simplified frigate model with hangar edge modification
TUNAHAN ŞIK
Yüksek Lisans
Türkçe
2025
İstanbul Teknik ÜniversitesiGemi İnşaatı ve Gemi Makineleri Mühendisliği Ana Bilim Dalı
Yükleniyor...
- Development of a solver for the compressible large eddy simulations
Sıkıştırılabilir büyük burgaç simulasyonu için bir çözücü geliştirilmesi
MUSTAFA AKDEMİR
- Investigation of bluff-body stabilized premixed flame dynamics using an in-house flow solver lestr3d
Küt cisim ile stabiılize edilmiş ön karışımlı alev dinamiklerinin özgün akış çözücüsü lestr3d ile incelenmesi
BURAKHAN ŞÜKÜROĞLU
Yüksek Lisans
İngilizce
2023
İstanbul Teknik ÜniversitesiUçak ve Uzay Mühendisliği Ana Bilim Dalı
Yükleniyor...
- Modification of a three-equation eddy-viscosity turbulence model for anisotropic turbulence
Üç denklemli bir eddy viskozite türbülans modelinin anizotropik türbülans için geliştirilmesi
MURAT UMUT YANGAZ