Developments in the theory of the Prigogine-Herman kinetic equation of vehicular traffic
Författare
Summary, in English
The nonlinear kinetic equation of Prigogine and Herman is examined in regards to existence and uniqueness of solutions. The solution exists and is unique in the Banach space of bounded continuous functions over a particular subspace Ω.
The equilibrium solution of the kinetic equation of Prigogine and Herman is used to derive asymptotic type series expansions in the form of Hilbert or Chapman and Enskog for concentrations (c ) corresponding to the stable flow regime of traffic (0 < c < c crit ). As expected the conservation of mass equation, the Lighthill-Whitham-Richards model, can be obtained from these expansions.
We use the Chapman-Enskog expansion to obtain hydrodynamic-like equations equivalent to the Euler, Navier-Stokes or Burnett equations of fluid flow, depending on the order of the series expansions we used. The zeroth and first order hydrodynamic-like partial differential equations are solved using appropriate conservative numerical schemes. Analogous continuum approximations up to order one are obtained from the Hilbert expansion.
Last a zeroth-order (extended Lighthill-Whitham-Richards) model is obtained for unstable flow at sufficiently high concentrations.
The equilibrium solution of the kinetic equation of Prigogine and Herman is used to derive asymptotic type series expansions in the form of Hilbert or Chapman and Enskog for concentrations (c ) corresponding to the stable flow regime of traffic (0 < c < c crit ). As expected the conservation of mass equation, the Lighthill-Whitham-Richards model, can be obtained from these expansions.
We use the Chapman-Enskog expansion to obtain hydrodynamic-like equations equivalent to the Euler, Navier-Stokes or Burnett equations of fluid flow, depending on the order of the series expansions we used. The zeroth and first order hydrodynamic-like partial differential equations are solved using appropriate conservative numerical schemes. Analogous continuum approximations up to order one are obtained from the Hilbert expansion.
Last a zeroth-order (extended Lighthill-Whitham-Richards) model is obtained for unstable flow at sufficiently high concentrations.
Avdelning/ar
- Matematik LTH
- Partial differential equations
Publiceringsår
2000
Språk
Engelska
Dokumenttyp
Doktorsavhandling
Ämne
- Mathematics
Nyckelord
- Chapman-Enskog expansion
- Traffic
- Prigogine-Herman
- Kinetic equation
- Unstable flow
Status
Published
Forskningsgrupp
- Partial differential equations
Handledare
- Paul Nelson
ISBN/ISSN/Övrigt
- ISBN: 0-599-73811-1
- ISBN: 978-0-599-73811-9
Försvarsdatum
26 maj 2000
Försvarstid
10:00
Försvarsplats
College Station, Texas, USA
Opponent
- Daripa Prabir