scholarly journals Finite‐Amplitude Traveling Waves in N‐dimensional Gas Flow

1971 ◽  
Vol 50 (1A) ◽  
pp. 124-124
Author(s):  
G. M. Schindler
Keyword(s):  
Traveling Waves ◽  
Gas Flow ◽  
Finite Amplitude

Activation of Nanoflows for Fuel Cells

2012 ◽  
Vol 3 (2) ◽  
Author(s):  
Z. Insepov ◽  
R. J. Miller
Keyword(s):  
Carbon Nanotubes ◽  
Fuel Cells ◽  
Surface Waves ◽  
Traveling Waves ◽  
Gas Flow ◽  
Atomic Mass ◽  
Flow Rates ◽  
Selective Filter ◽  
Phase Velocities ◽  
Dynamics Simulations

Propagation of Rayleigh traveling waves from a gas on a nanotube surface activates a macroscopic flow of the gas (or gases) that depends critically on the atomic mass of the gas. Our molecular dynamics simulations show that the surface waves are capable of actuating significant macroscopic flows of atomic and molecular hydrogen, helium, and a mixture of both gases both inside and outside carbon nanotubes (CNT). In addition, our simulations predict a new “nanoseparation” effect when a nanotube is filled with a mixture of two gases with different masses or placed inside a volume filled with a mixture of several gases with different masses. The mass selectivity of the nanopumping can be used to develop a highly selective filter for various gases. Gas flow rates, pumping, and separation efficiencies were calculated at various wave frequencies and phase velocities of the surface waves. The nanopumping effect was analyzed for its applicability to actuate nanofluids into fuel cells through carbon nanotubes.

MATHEMATICAL MODELING OF THERMOGASDYNAMIC PROCESSES IN PISTON ENGINES

2021 ◽  
pp. 12-17
Author(s):  
A. N. Berdnik ◽  
V. O. Remeslovskiy
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Solitary Waves ◽  
Gas Flow ◽  
Method Of Characteristics ◽  
Finite Amplitude ◽  
Piston Engine ◽  
The Method Of Characteristics ◽  
Turbocharging System ◽  
Calculation Results

A method for calculating the non-stationary gas flow in the exhaust pipeline of a piston engine by the method of solitary waves of finite amplitude is presented. The comparison of experimental data and calculation results by the method of characteristics and obtained when considering the process of propagation of solitary waves through the exhaust pipeline of a piston engine equipped with a pulsed turbocharging system is shown.

Ideal gas flow behind a finite-amplitude shock wave

1970 ◽  
Vol 2 (1) ◽  
pp. 57-59
Author(s):  
M. D. Ustinov
Keyword(s):  
Shock Wave ◽  
Gas Flow ◽  
Finite Amplitude ◽  
Ideal Gas
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