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Showing 1 to 8 of 8 for “"Discrete ordinate"”.
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Discrete ordinates CT organ dose simulator (DOCTORS)
… CT voxel phantom. This work proposes a new code, Discrete Ordinate CT Organ Dose Simulator (DOCTORS) which utilizes a GPU accelerated raytracer and discrete ordinate solver to compute photon flux in the patient. The flux is then converted to dose.</p><p>The DOCTORS code was benchmarked against …
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Numerical Simulation of an Open Channel Ultraviolet Waste-water Disinfection Reactor
… the microbial particle trajectory and the discrete ordinate model to calculate the UV intensity field. The numerical predictions are compared with the available experimental data to validate the CFD model. A parametric study is performed to understand the effects of different parameters on …
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Radiation shielding calculations by means of MCNPX
… previously obtained by means of the multigroup discrete ordinate code. Isotropic and anisotropic source terms were assumed. Furthermore, two geometries were considered, namely, spherical and cylindrical The neutron and photon total dose rates and dose attenuation factors were calculated at 1.5 m …
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The interaction of fast neutrons with shielding and fusion blanket materials
… were performed using the one-dimensional discrete-ordinate neutron transport code ANISN with the ZZ-FEWG 1/ 31-1F cross section library. A computer programme based on Gaussian smoothing function was used to smooth the calculated data and to match the experimental data. There was general …
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Adaptive discrete-ordinates algorithms and strategies
… in particle transport calculations are the discrete-ordinates method and function-expansion methods. Both approaches are limited if the transport solution is not smooth. Angular discretization errors in the discrete-ordinates method arise from the inability of a given quadrature set to …
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Image based analysis of visibility in smoke laden environments
… related to zonal method and the limitations in discrete ordinate method. The algorithm has been combined with a two pass solution method to produce high resolution images without introducing excessive number of rays from the light source. The convergence of the iterative solution procedure …
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Combined multispectral/hyperspectral remote sensing of tropospheric aerosols for quantification of their direct radiative effect
… times faster than the standard and efficient discrete ordinate technique and is accurate to the 6th decimal place. The second part of our study forms the core and is divided into two chapters the first of which is a rigorous sensitivity and optimal estimation based information content study …
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Reduced-order modeling of non-Boltzmann thermochemistry and radiation for hypersonic flows
… transfer and spectral modeling. A combination of discrete-ordinate method and finite-volume discretization with mesh sweeping is used to resolve generalized three-dimensional radiation fields in the angular and spatial domains. A reduced-order representation of the spectral variation in …