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Papers by Joseph Shang
31st Plasmadynamics and Lasers Conference, 2000
46th AIAA Aerospace Sciences Meeting and Exhibit, 2008
ABSTRACT
27th Thermophysics Conference, 1992
27th Aerospace Sciences Meeting, 1989
Low pressure arc-jets are used to simulate the plasma flow around an aerospace vehicle during hyp... more Low pressure arc-jets are used to simulate the plasma flow around an aerospace vehicle during hypersonic flight in a planetary atmosphere. Numerical simulations of the gas flow in the nozzle of the arc-jet have been carried out using a thermochemical non-equilibrium Navier-Stokes solver. The flow properties are computed for different operating conditions of the arc-jet. The influence of the chemical kinetic scheme and the electric arc model are examined.
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
35th AIAA Plasmadynamics and Lasers Conference, 2004
Journal of Computational Physics, 1997
High-order compact-difference-based finite-volume schemes are developed, analyzed, and implemente... more High-order compact-difference-based finite-volume schemes are developed, analyzed, and implemented for linear wave propagation phenomena with particular emphasis on computational electromagnetics in the timedomain. The formulation combines the primitive function approach with fivepoint spatially sixth-and fourth-order methods. Optimization in the semidiscrete case is achieved by minimizing dispersion and isotropy error. The fully discrete scheme is examined by adopting the classical fourth-order Runge-Kutta technique. Stability bounds are established and the coefficients for the spatial discretization are readjusted for optimum performance. The scheme is then formally extended to multiple dimensions. Consistent boundary conditions are presented for the reconstruction operator as well as flux specification. Several calculations in one and three dimensions confirm the properties of the method. ᮊ 1997 Academic Press
IEEE Transactions on Antennas and Propagation, 1997
Page 1. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 11, NOVEMBER 1997 1573 Toward... more Page 1. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 11, NOVEMBER 1997 1573 Toward the Construction of a Fourth-Order Difference Scheme for Transient EM Wave Simulation: Staggered Grid Approach ...
Computer Physics Communications, 2013
The spectral radiation transfer equation in 2D axisymmetrical and 3D geometries is solved by the ... more The spectral radiation transfer equation in 2D axisymmetrical and 3D geometries is solved by the P 1approximation of the spherical harmonics and ray-tracing methods. Martian atmosphere and typical entry conditions are considered. Navier-Stokes equations coupled with the nonequilibrium vibrational excitation and finite rate chemistry describe thermodynamically and chemically nonequilibrium gas. The multi-group model is used to model optical properties of CO 2 -N 2 mixture. The developed methodology of integration of the P 1 -approximation on unstructured grids and subsequent numerical solution allow us to reach reasonable agreement with the accurate ray-tracing method and drastically reduce the cost of solution of the radiation transfer equation in multi-dimensional geometries.
31st Plasmadynamics and Lasers Conference, 2000
46th AIAA Aerospace Sciences Meeting and Exhibit, 2008
ABSTRACT
27th Thermophysics Conference, 1992
27th Aerospace Sciences Meeting, 1989
Low pressure arc-jets are used to simulate the plasma flow around an aerospace vehicle during hyp... more Low pressure arc-jets are used to simulate the plasma flow around an aerospace vehicle during hypersonic flight in a planetary atmosphere. Numerical simulations of the gas flow in the nozzle of the arc-jet have been carried out using a thermochemical non-equilibrium Navier-Stokes solver. The flow properties are computed for different operating conditions of the arc-jet. The influence of the chemical kinetic scheme and the electric arc model are examined.
44th AIAA Aerospace Sciences Meeting and Exhibit, 2006
45th AIAA Aerospace Sciences Meeting and Exhibit, 2007
35th AIAA Plasmadynamics and Lasers Conference, 2004
Journal of Computational Physics, 1997
High-order compact-difference-based finite-volume schemes are developed, analyzed, and implemente... more High-order compact-difference-based finite-volume schemes are developed, analyzed, and implemented for linear wave propagation phenomena with particular emphasis on computational electromagnetics in the timedomain. The formulation combines the primitive function approach with fivepoint spatially sixth-and fourth-order methods. Optimization in the semidiscrete case is achieved by minimizing dispersion and isotropy error. The fully discrete scheme is examined by adopting the classical fourth-order Runge-Kutta technique. Stability bounds are established and the coefficients for the spatial discretization are readjusted for optimum performance. The scheme is then formally extended to multiple dimensions. Consistent boundary conditions are presented for the reconstruction operator as well as flux specification. Several calculations in one and three dimensions confirm the properties of the method. ᮊ 1997 Academic Press
IEEE Transactions on Antennas and Propagation, 1997
Page 1. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 11, NOVEMBER 1997 1573 Toward... more Page 1. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 45, NO. 11, NOVEMBER 1997 1573 Toward the Construction of a Fourth-Order Difference Scheme for Transient EM Wave Simulation: Staggered Grid Approach ...
Computer Physics Communications, 2013
The spectral radiation transfer equation in 2D axisymmetrical and 3D geometries is solved by the ... more The spectral radiation transfer equation in 2D axisymmetrical and 3D geometries is solved by the P 1approximation of the spherical harmonics and ray-tracing methods. Martian atmosphere and typical entry conditions are considered. Navier-Stokes equations coupled with the nonequilibrium vibrational excitation and finite rate chemistry describe thermodynamically and chemically nonequilibrium gas. The multi-group model is used to model optical properties of CO 2 -N 2 mixture. The developed methodology of integration of the P 1 -approximation on unstructured grids and subsequent numerical solution allow us to reach reasonable agreement with the accurate ray-tracing method and drastically reduce the cost of solution of the radiation transfer equation in multi-dimensional geometries.