Parallel processing approach for radiative heat transfer prediction in participating media

Saltiel, C.; Naraghi, Mohammad H.

doi:10.2514/3.489

Cited by 10 publications

(3 citation statements)

References 8 publications

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“…Although scattering was not considered, the scheme appears to be very promising for integral-differential models. Saltier and Naraghi (1993) used a proprietary massive parallel system (Connection Machine, CM-2 with 16384 (= 2 14 ) processors) to study the parallel performance of the discrete exchange factor method. The method is directly applied using the Fortran-90 array processing statement.…”

Section: Nomenclaturementioning

confidence: 99%

Parallel Computing of Two Numerical Quadratures for an Integral Formulation of Transient Radiation Transport

Hsu

2003

Heat Transfer: Volume 1

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Parallel computing of the transient radiative transfer process in the three-dimensional homogeneous and nonhomogeneous participating media is studied with an integral equation model. The model can be used for analyzing the ultra-short light pulse propagation within the highly scattering media. Two numerical quadratures are used: the discrete rectangular volume (DRV) method and YIX method. The parallel versions of both methods are developed for one-dimensional and three-dimensional geometries, respectively. Both quadratures achieve good speedup in parallel performance. Because the integral equation model uses very small amount of memory, the parallel computing can take advantage of having each compute node or processor store the full spatial domain information without using the typical domain decomposition parallelism, which will be necessary in other solution methods, e.g., discrete ordinates and finite volume methods, for large scale simulations. The parallel computation is conducted by assigning different portion of the quadrature to different compute node. In DRV method, a variation of the spatial domain decomposition is used. In the case of YIX scheme, the angular quadrature is divided up according to the number of compute nodes, instead of the spatial domain being divided. This parallel scheme minimizes the communications overhead. The only communication needed is at the end of each time step when each node shares the partial integrated result of the current time step with all other compute nodes. The angular quadrature decomposition approach leads to very good parallel efficiency. Two new discrete ordinate sets are used in the YIX angular quadrature and their parallel performances are discussed. One of the discrete ordinates sets, called spherical ring set, is also suitable for use in the conventional discrete ordinates method.

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Section: Nomenclaturementioning

confidence: 99%

Parallel Computing of Two Numerical Quadratures for an Integral Formulation of Transient Radiation Transport

Hsu

2003

Heat Transfer: Volume 1

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“…With the exception of the P-N approximation, all the previously mentioned methods have been applied in parallel computer architectures. The parallelization of the (a) zonal and (b) Monte Carlo methods has been addressed by Saltiel and Naraghi (1993) and Burns and Pryor (1989) and Farmer and Howell (1998), respectively. The same topic has been investigated for the discrete ordinates method by Gonc Ëalves and , for the discrete transfer method by Novo et al (1999); Cumber and Beeri (1998) and for the finite volume method by Liu et al (1999); Coelho and Gonc Ëalves (1999).…”

Section: Introductionmentioning

confidence: 99%

Parallel ray tracing for radiative heat transfer

Marakis

Chamiço²,

Brenner³

et al. 2001

Int Jnl of Num Meth for HFF

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Notes that, in a full-scale application of the Monte Carlo method for combined heat transfer analysis, problems usually arise from the large computing requirements. Here the method to overcome this difficulty is the parallel execution of the Monte Carlo method in a distributed computing environment. Addresses the problem of determination of the temperature field formed under the assumption of radiative equilibrium in an enclosure idealizing an industrial furnace. The medium contained in this enclosure absorbs, emits and scatters anisotropically thermal radiation. Discusses two topics in detail: first, the efficiency of the parallelization of the developed code, and second, the influence of the scattering behavior of the medium. The adopted parallelization method for the first topic is the decomposition of the statistical sample and its subsequent distribution among the available processors. The measured high efficiencies showed that this method is particularly suited to the target architecture of this study, which is a dedicated network of workstations supporting the message passing paradigm. For the second topic, the results showed that taking into account the isotropic scattering, as opposed to neglecting the scattering, has a pronounced impact on the temperature distribution inside the enclosure. In contrast, the consideration of the sharply forward scattering, that is characteristic of all the real combustion particles, leaves the predicted temperature field almost undistinguishable from the absorbing/emitting case.

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“…Saltiel and Naraghi [3] implemented a modified version of the zone method, the discrete exchange factor method, in a connection machine (CM-2) with 16,384 (2 15 ) processors. Each processor calculates a number of elements of the direct exchange factor matrix equal to the ratio of the total number of elements of this matrix to the number of processors.…”

Section: Introductionmentioning

confidence: 99%

Parallelization of the Discrete Ordinates Method

Gonçalves

Coelho

1997

Numerical Heat Transfer, Part B: Fundamentals

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Two different paralletiUJtionstralegies ofthe discrete ordi1UJJes method (DOM) are described and impkmented in a distriblded·memory computer. In the angu/lJr decomposition (ADP), each processor performs the cakulDlWns for the whok domain bid deals only with a few directions, whik in the spatial domain decomposition (DDP), each processor treats an the directions bid only for a subdomain. In the ADP the number of iterations is independent of the number of processors, COnlrdry to the DDP, and higher efficiencies are obtained. The i'lfluence of the order of quadrature, grid size, and absorption coefficient of the medium is also investigated.

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Parallel processing approach for radiative heat transfer prediction in participating media

Cited by 10 publications

References 8 publications

Parallel Computing of Two Numerical Quadratures for an Integral Formulation of Transient Radiation Transport

Parallel Computing of Two Numerical Quadratures for an Integral Formulation of Transient Radiation Transport

Parallel ray tracing for radiative heat transfer

Parallelization of the Discrete Ordinates Method

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