Derivation of a conservation equation for mean molecular weight for a two-constituent gas within a three-dimensional, time-dependent model of the thermosphere

1983 ◽  
Vol 31 (10) ◽  
pp. 1209-1222 ◽  
Author(s):  
T.J. Fuller-Rowell ◽  
D. Rees
Keyword(s):  
Molecular Weight ◽  
Three Dimensional ◽  
Conservation Equation ◽  
Time Dependent ◽  
Dependent Model ◽  
Time Dependent Model ◽  
Mean Molecular Weight

scholarly journals The thermosphere of Titan simulated by a global three-dimensional time-dependent model

2000 ◽  
Vol 105 (A9) ◽  
pp. 20833-20856 ◽  
Author(s):  
I. C. F. Müller-Wodarg ◽  
R. V. Yelle ◽  
M. Mendillo ◽  
L. A. Young ◽  
A. D. Aylward
Keyword(s):  
Three Dimensional ◽  
Time Dependent ◽  
Dependent Model ◽  
Time Dependent Model

scholarly journals Flows and dynamos in a model of stellar radiative zones

2018 ◽  
Vol 84 (3) ◽  
Author(s):  
Radostin D. Simitev ◽  
Friedrich H. Busse
Keyword(s):  
Prandtl Number ◽  
Three Dimensional ◽  
Stellar Structure ◽  
Time Dependent ◽  
Electrically Conductive ◽  
Stellar Radiation ◽  
Baroclinic Torque ◽  
Dependent Model ◽  
Standard Models ◽  
Time Dependent Model

Stellar radiative zones are typically assumed to be motionless in standard models of stellar structure but there is sound theoretical and observational evidence that this cannot be the case. We investigate by direct numerical simulations a three-dimensional and time-dependent model of stellar radiation zones consisting of an electrically conductive and stably stratified anelastic fluid confined to a rotating spherical shell and driven by a baroclinic torque. As the baroclinic driving is gradually increased a sequence of transitions from an axisymmetric and equatorially symmetric time-independent flow to flows with a strong poloidal component and lesser symmetry are found. It is shown that all flow regimes characterised by significant non-axisymmetric components are capable of generating a self-sustained magnetic field. As the value of the Prandtl number is decreased and the value of the Ekman number is decreased, flows become strongly time dependent with progressively complex spatial structure and dynamos can be generated at lower values of the magnetic Prandtl number.

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