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Numerical simulation of one dimensional rarefied gas flows/Richard Lee Shueh Leng

Numerical simulation of one dimensional rarefied gas flows_Richard Lee Shueh Leng_A2_2011_NI
Tesis ini bertujuan mengkaji simulasi beranka menggunakan kaedah DSMC (Simulasi Langsung Monte Carlo) untuk simulasi gas langka apabila nombor Knudsen cukup besar dan andaian kontinum tidak dapat digunakan lagi. Simulasi Langsung Monte Carlo (DSMC) ialah alat simulasi yang hebat bagi gas langka hipersonik tetapi tidak sesuai untuk arus di mana nombor Machnya rendah kerana saiz sampel banyak diperlukan untuk membezakan variasi kecil dalam distributasi tekanan dan kepadatan. Profil bagi suhu, nombor Mach, tekanan sepanjang satu dimensi aliran gas telah diperolehi dan membuat perbandingan antara gas langka dan gas continuum. Pengetahuan yang diperolehi daripada kajian ini boleh digunakan untuk lebih memahami aliran gas langka ke atas objek supaya sifat aerothermodinamik dapat direka dengan lebih baik dalam kapal angkasa. ______________________________________________________________________________________ This thesis presents a numerical simulation using DSMC method for simulating rarefied gas flows where the Knudsen number is quite large and the continuum assumption may not be valid anymore. The direct simulation Monte Carlo (DSMC) method is a powerful simulation tool for hypersonic rarefied gas flows but is unsuitable for low Mach number gas flows because many sample size is required to differentiate the small variation of pressure and density distributions. The distributions of temperatures, Mach number and pressure along the one dimensional flow have been obtained and compared with the continuum flow. The knowledge gained from this research can be used to understand rarefied gas flows over an object so that a better aerothermodynamics property can be designed for space vehicle.
Contributor(s):
Richard Lee Shueh Leng - Author
Primary Item Type:
Final Year Project
Language:
English
Subject Keywords:
numerical simulation ; Knudsen; space vehicle
First presented to the public:
5/1/2011
Original Publication Date:
7/31/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Aerospace Engineering
Citation:
Extents:
Number of Pages - 77
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-07-31 15:53:09.756
Submitter:
Nor Hayati Ismail

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