Thermophoretic Motion of Spherical Particles in a Free Molecule Flow Regime via Monte Carlo Method
Monte Carlo Metodu ile Serbest Molekül Akış Rejiminde Küresel Parçacıkların Termoforetik Hareketi
- Tez No: 714333
- Danışmanlar: PROF. DR. JOHN WILLIAMS
- Tez Türü: Yüksek Lisans
- Konular: Havacılık Mühendisliği, Sivil Havacılık, Aeronautical Engineering, Civil Aviation
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2012
- Dil: İngilizce
- Üniversite: Queen Mary University of London
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Havacılık ve Uzay Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 83
Özet
The phenomenon of thermophoresis via a modified Monte Carlo Method is theorized to evaluate the net forces on a spherical particle in a collisionless and free molecular regime flow. The particle concentration in the gas flow is assumed to be dilute. The computational gas molecules from two opposite imaginary sources are sampled through random targets with random directions by utilising Monte Carlo method. Therefore, each molecule is followed by their motions and identified by an endpoint and a collision point with the particle. The velocity distribution function is obtained and modelled to process the thermophoresis model. After achieving the results of both models, the net forces of thermophoresis acting on the spherical particle can be obtained as the combination of the forces caused by two opposite directions. By considering the outcomes of the input parameters, the modified final model is produced through both the thermophoretic motion model of the velocity distribution function and the flow modelling of Monte Carlo method. Consequently, an approximate demonstration of thermophoretic motion is obtained, and the drag forces of thermophoresis phenomenon are illustrated.
Özet (Çeviri)
The phenomenon of thermophoresis via a modified Monte Carlo Method is theorized to evaluate the net forces on a spherical particle in a collisionless and free molecular regime flow. The particle concentration in the gas flow is assumed to be dilute. The computational gas molecules from two opposite imaginary sources are sampled through random targets with random directions by utilising Monte Carlo method. Therefore, each molecule is followed by their motions and identified by an endpoint and a collision point with the particle. The velocity distribution function is obtained and modelled to process the thermophoresis model. After achieving the results of both models, the net forces of thermophoresis acting on the spherical particle can be obtained as the combination of the forces caused by two opposite directions. By considering the outcomes of the input parameters, the modified final model is produced through both the thermophoretic motion model of the velocity distribution function and the flow modelling of Monte Carlo method. Consequently, an approximate demonstration of thermophoretic motion is obtained, and the drag forces of thermophoresis phenomenon are illustrated.
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