Time-Dependent Numerical Simulation of Hot Ion Outflow from the Polar Ionosphere

2013 ◽  
pp. 366-371 ◽  
Author(s):  
T. I. Gombosi ◽  
T. E. Cravens ◽  
A. F. Nagy ◽  
J. H. Waite
Keyword(s):  
Numerical Simulation ◽  
Time Dependent ◽  
Polar Ionosphere ◽  
Ion Outflow

scholarly journals Research on Reservoir Numerical Simulation with Consideration of Time-dependent Physical Properties

2021 ◽  
Vol 692 (4) ◽  
pp. 042128
Author(s):  
Pingqi Zhao ◽  
Tianlu Ni ◽  
Shumei He ◽  
Fang Huang ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Physical Properties ◽  
Time Dependent

Numerical Simulation of Ship Collision and Validations With Experimental Results

2021 ◽  
Author(s):  
Xiangbiao Wang ◽  
Chun Bao Li ◽  
Ling Zhu
Keyword(s):  
Numerical Simulation ◽  
Model Test ◽  
Structural Damage ◽  
Added Mass ◽  
Ship Motion ◽  
Time Dependent ◽  
Structural Deformation ◽  
Structure Interaction ◽  
Ship Collision ◽  
Good Agreement

Abstract Ship collision accidents occur from time to time in recent years, and this would cause serious consequences such as casualties, environmental pollution, loss of cargo on board, damage to the ship and its equipment, etc. Therefore, it is of great significance to study the response of ship motion and the mechanism of structural damage during the collision. In this paper, model experiments and numerical simulation are used to study the ship-ship collision. Firstly, the Coupled Eulerian-Lagrangian (CEL) was used to simulate the fluid-structure interaction for predicting structural deformation and ship motion during the normal ship-ship collision. Meanwhile, a series of model tests were carried out to validate the numerical results. The validation presented that the CEL simulation was in good agreement with the model test. However, the CEL simulation could not present the characteristics the time-dependent added mass.

A One Dimensional, Time Dependent Inlet / Engine Numerical Simulation for Aircraft Propulsion Systems

1997 ◽  
Author(s):  
Doug Garrard ◽  
Milt Davis ◽  
Steve Wehofer ◽  
Gary Cole
Keyword(s):  
Numerical Simulation ◽  
Gas Turbine ◽  
High Frequency ◽  
Gas Turbine Engine ◽  
Simulation System ◽  
Time Dependent ◽  
Propulsion Systems ◽  
Turbine Engine ◽  
One Dimensional ◽  
Supersonic Inlet

The NASA Lewis Research Center (LeRC) and the Arnold Engineering Development Center (AEDC) have developed a closely coupled computer simulation system that provides a one dimensional, high frequency inlet / engine numerical simulation for aircraft propulsion systems. The simulation system, operating under the LeRC-developed Application Portable Parallel Library (APPL), closely coupled a supersonic inlet with a gas turbine engine. The supersonic inlet was modeled using the Large Perturbation Inlet (LAPIN) computer code, and the gas turbine engine was modeled using the Aerodynamic Turbine Engine Code (ATEC). Both LAPIN and ATEC provide a one dimensional, compressible, time dependent flow solution by solving the one dimensional Euler equations for the conservation of mass, momentum, and energy. Source terms are used to model features such as bleed flows, turbomachinery component characteristics, and inlet subsonic spillage while unstarted. High frequency events, such as compressor surge and inlet unstart, can be simulated with a high degree of fidelity. The simulation system was exercised using a supersonic inlet with sixty percent of the supersonic area contraction occurring internally, and a GE J85-13 turbojet engine.

Time-dependent numerical simulation of the VGF process with a rotating magnetic field

2007 ◽  
Vol 303 (1) ◽  
pp. 250-252 ◽  
Author(s):  
M.P. Bellmann ◽  
O. Pätzold ◽  
U. Wunderwald ◽  
M. Stelter ◽  
H.J. Möller
Keyword(s):  
Magnetic Field ◽  
Numerical Simulation ◽  
Rotating Magnetic Field ◽  
Time Dependent

Numerical Simulation of Magnetic Resonance Experiments: Concepts and Applications to Static, Rotating and Double Rotating Experiments

1994 ◽  
Vol 49 (1-2) ◽  
pp. 80-88 ◽  
Author(s):  
M. Baldus ◽  
T. O. Levante ◽  
B. H. Meier
Keyword(s):  
Numerical Simulation ◽  
Magnetic Resonance ◽  
Object Oriented ◽  
Magic Angle Spinning ◽  
Spin Systems ◽  
Object Oriented Programming ◽  
Time Dependent ◽  
Magic Angle ◽  
Programming Environment ◽  
Angle Spinning

Abstract An object-oriented programming environment for numerical simulation of magnetic resonance spectra is introduced and applied to NQR and NMR of quadrupolar nuclei. Using a Floquet approach it is possible to perform simulations of spin systems that are described by explicitly time-dependent Hamiltonians in full analogy to simulations of time-independent systems. Applications to magic angle spinning and double rotation are discussed.

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