ROBERTO DAVID MARTINEZ GARCIA
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Artigo IPEN-doc 07698 A comparison of three quadrature schemes for discrete-ordinates calculations of neutral particle transport in ducts1999 - MARTINEZ GARCIA, R.D.; ONO, S.Artigo IPEN-doc 07700 A new quadrature scheme for solving azimuthally dependent transport problems1998 - CHALHOUB, E.S.; MARTINEZ GARCIA, R.D.Artigo IPEN-doc 07549 The Fsub(N) method in atmospheric radiative transfer1998 - MARTINEZ GARCIA, R.D.; SIEWERT, C.E.Artigo IPEN-doc 07553 A spherical-harmonics solution for radiative-transfer problems with reflecting boundaries and internal sources1998 - BARICHELLO, L.B.; MARTINEZ GARCIA, R.D.; SIEWERT, C.E.Artigo IPEN-doc 07565 A Psub(N) solution to the multigroup slowing-down problem-I: basic formulation1998 - CALDEIRA, A.D.; DIAS, A.F.; MARTINEZ GARCIA, R.D.Artigo IPEN-doc 07566 A Psub(N) solution to the multigroup slowing-down problem-II: the degenerate case1998 - CALDEIRA, A.D.; DIAS, A.F.; MARTINEZ GARCIA, R.D.Artigo IPEN-doc 07701 Coupled scalar and vector Psub(N) methods for solving multigroup transport problems in multislab geometry2000 - DIAS, A.F.; MARTINEZ GARCIA, R.D.A spherical-harmonics (PN) method that incorporates and couples existent scalar and vector versions of the method is developed. The scalar (group-by-group) version of method is applied to the slowing-down energy range and the vector version to the thermal energy range. The link of coupling between these methods is the slowing-down source to the thermal groups which becomes available once the problems for all of the slowing-down groups are solved with the scalar method. The advantage of using the coupled PN method over the vector method when solving transport problems defined in extended energy range is demonstarted in this work.