scholarly journals Intense nonneutral beam propagation in a periodic solenoidal field using a macroscopic fluid model with zero thermal emittance

1997 ◽  
Author(s):  
R.C. Davidson ◽  
P. Stoltz ◽  
C. Chen
Keyword(s):  
Fluid Model ◽  
Beam Propagation ◽  
Thermal Emittance ◽  
Solenoidal Field

scholarly journals Fast ignitor: Fluid dynamics of channel formation and laser beam propagation

1997 ◽  
Vol 15 (4) ◽  
pp. 541-556 ◽  
Author(s):  
S. Hain ◽  
P. Mulser
Keyword(s):  
Electromagnetic Wave ◽  
Radiation Pressure ◽  
Fluid Model ◽  
Fluid Dynamic ◽  
Beam Propagation ◽  
Dense Matter ◽  
Nonlinear Propagation ◽  
Channel Formation ◽  
Fast Ignitor ◽  
Ablation Pressure

The concept of fast ignitor is intimately connected with the fundamental phenomenon of ultra-intense light beam propagation through dense matter in which kinetic effects combine with radiation pressure dominated hydrodynamics to form a complex scenario of extremely non-linear physics. In this paper, the fluid dynamic aspect of channel formation in a highly over-dense plasma is studied and possible attenuation mechanisms of the propagating pulse are evaluated in one dimension. Under the assumption that mass ablation reaches a quasistationary state, the radiation-assisted ablation pressure, the speed of the bow shock, and the density steepening around the critical point are determined self-consistently from the ID fluid conservation relations and the electromagnetic wave equation. Due to ponderomotive profile steepening, the ablation pressure is reduced by 40% in the subsonic region and is dominated by the radiation pressure in the supersonic domain. Channel lengths are calculated for various intensities and pellet compression ratios. Likewise, the nonlinear propagation of a superintense electromagnetic wave in an underdense plasma channel is investigated for the ID case with the help of a relativistic fluid model.

ENTROPY GENERATION IN BLOOD FLOW WITH HEAT AND MASS TRANSFER FOR THE ELLIS FLUID MODEL

2018 ◽  
Vol 49 (8) ◽  
pp. 747-760 ◽  
Author(s):  
Muhammad Mubashir Bhatti ◽  
M. Ali Abbas ◽  
M. M. Rashidi
Keyword(s):  
Mass Transfer ◽  
Blood Flow ◽  
Heat And Mass Transfer ◽  
Entropy Generation ◽  
Fluid Model
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