alpha disc model in accretion disks
DESCRIPTION
Alpha Disc Model in Accretion Disks. Hongyu Gong Xiamen University. 1. Background 2. Analysis 3. Numerical method 4. Conclusion. Accretion Disks. An accretion disc is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a massive central body. . - PowerPoint PPT PresentationTRANSCRIPT
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Alpha Disc Model in Accretion Disks
Hongyu GongXiamen University
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• 1. Background• 2. Analysis• 3. Numerical method• 4. Conclusion
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Accretion Disks
• An accretion disc is a structure (often a circumstellar disk) formed by diffuse material in orbital motion around a massive central body.
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Accretion Disks
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α-Disc Model
• By using the equation of hydrostatic equilibrium, combined with conservation of angular momentum and assuming that the disc is thin, the equations of disk structure may be solved in terms of the parameter.
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Equations
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Parameters and Boundary Conditions
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Numerical Method
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Numerical Method
• f1(p,Fz,T)=-3*kes*p*Fz/(4*c*a*T*T*T);
• f2(p,T)=alpha*(p*kb*T/(u*mp)+1/3*a*T*T*T*T)*W*g;
• f3(p,Fz,T)= p*u*mp/(T*kb)*(kes*Fz/c-W*W*z)+3*kes*p*p*Fz/(4*c*a*T*T*T*T);
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Numerical Method
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Solutions
• T-z
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Solutions
• rho-z
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Solutions
• Fz-z
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Solutions
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Thank you!