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Browsing Research and Publications - Department of Mechanical Engineering by Title

Now showing items 3-13 of 13

A Criterion for the Validity of Parker's Model in Thermal Escape Problems for Planetary Atmospheres

Volkov, Alexey N. (2015-10-01)

Mass escape rate of mon- and diatomic gases from a planetary atmosphere is studied based on Parkerʼs model for a broad range of surface conditions. The escape rate is found to follow two asymptotic regimes, namely, high- ...
Effect of Bending Buckling of Carbon Nanotubes on Thermal Conductivity of Carbon Nanotube Materials

Volkov, Alexey N.; Shiga, Takuma; Nicholson, David; Shiomi, Junichiro; Zhigilei, Leonid V. (2012-03-01)
Fluid/Kinetic Hybrid Simulation of Atmospheric Escape: Pluto

Tucker, Orenthal J.; Erwin, Justin T.; Johnson, Robert E.; Volkov, Alexey N.; Cassidy, Timothy A. (2011)

A hybrid fluid/molecular kinetic model was developed to describe the escape of molecules from the gravitational well of a planet's atmosphere. This model was applied to a one dimensional, radial description of molecular ...
Heat Conduction in Carbon Nanotube Materials: Strong Effect of Intrinsic Thermal Conductivity of Carbon Nanotubes

Volkov, Alexey N.; Zhigilei, Leonid V. (2012-07-24)

Computational study of thermal conductivity of interconnected networks of bundles in carbon nanotube (CNT) films reveals a strong effect of the finite thermal conductivity kT of individual nanotubes on the conductivity ...
Kinetic Model of a Collisional Admixture in Dusty Gas and its Application to Calculating Flow Past Bodies

Volkov, Alexey N.; Tsirkunov, Yury M. (2000)

Using the methods of statistical physics, the basic kinetic equation describing the dynamics of a polydisperse admixture of solid particles in a dilute dusty-gas flow is derived. Particle rotation, inelastic collisions, ...
Kinetic Simulations of Thermal Escape from a Single Component Atmosphere

Volkov, Alexey N.; Tucker, Orenthal J.; Erwin, Justin T.; Johnson, Robert E. (2011-06-06)
Molecular-Kinetic Simulations of Escape from the Ex-Planet and Exoplanets: Criterion for Transonic Flow

Johnson, Robert E.; Volkov, Alexey N.; Erwin, Justin T. (2013-12-06)

The equations of gas dynamics are extensively used to describe atmospheric loss from solar system bodies and exoplanets even though the boundary conditions at infinity are not uniquely defined. Using molecular-kinetic ...
Numerical Modelling of the Magnus Force and the Aerodynamic Torque on a Spinning Sphere in Transitional Flow

Volkov, Alexey N. (2007)

Three dimensional transitional flow over a spinning sphere is studied numerically by the direct simulation Monte Carlo method. The flow is assumed to be steady-state, gas molecules interact with each other as hard spheres ...
Thermal Escape in the Hydrodynamic Regime: Reconsideration of Parker's Isentropic Theory Based on Results of Kinetic Simulations

Volkov, Alexey N.; Johnson, Robert E. (2013-03-10)
Thermally Driven Atmospheric Escape: Transition from Hydrodynamic to Jeans Escape

Volkov, Alexey N.; Johnson, Robert E.; Tucker, Orenthal J.; Erwin, Justin T. (2011-02-16)
Volatile Loss and Classification of Kuiper Belt Objects

Johnson, R. E.; Oza, A.; Young, L. A.; Volkov, A. N.; Schmidt, C. (2015-08-10)

Observations indicate that some of the largest Kuiper Belt Objects (KBOs) have retained volatiles in the gas phase (e.g., Pluto), while others have surface volatiles that might support a seasonal atmosphere (e.g., Eris). ...

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Browsing Research and Publications - Department of Mechanical Engineering by Title

Browsing Research and Publications - Department of Mechanical Engineering by Title

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