Permeability of Ablative Materials Under Rarefied Gas Conditions
نویسندگان
چکیده
منابع مشابه
The Permeability of Ablative Materials Under Rarefied Gas Conditions
Numerical meshes of both cork and carbon fibre ablative materials in their virgin and pyrolised states, with realistic porosity and tortuosity, have been created from micro-computed tomography (μCT) scans. The porosity of each material has been calculated from the μCT scans and used to extract smaller representative sample volumes to perform numerical simulations on. Direct simulation Monte Car...
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Two-dimensional Direct Simulation Monte Carlo (DSMC) simulations are carried out for investigating the shock wave propagation and boundary layer effects in a shock tube flow, for a wide range of rarefied conditions. Nitrogen is used for all simulations. The Cercignani-Lampis-Lord (CLL) model of gas surface interactions is implemented to study the effects of boundary layer which develops behind ...
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The breakdown of the continuum equations of gas dynamics under conditions of rarefied flow is considered. The conditions of breakdown are of interest in assessing the physical accuracy of continuum solutions, in understanding the mathematical relations between different sets of continuum transport equations, and play a significant role in the development of hybrid methods that use both continuu...
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Micro/nano geometries with specified wall heat flux are widely encountered in electronic cooling and micro/nano-fluidic sensors. We introduce a new technique to impose the desired (positive/negative) wall heat flux boundary condition in the DSMC simulations. This technique is based on an iterative progress on the wall temperature magnitude. It is found that the proposed iterative technique has ...
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ژورنال
عنوان ژورنال: Journal of Spacecraft and Rockets
سال: 2016
ISSN: 0022-4650,1533-6794
DOI: 10.2514/1.a33279