PREPRINTSpages: [ 1 ] [ 2 ] [ 3 ] [ 4 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] [ 9 ] [ 10 ] [ 11 ] [ 12 ] [ 13 ] [ 14 ] [ 15 ] [ 16 ] [ 17 ] [ 18 ]  show all  Numerical investigation of a heatgenerating fluid with regard solidification for different cooling regimes on the boundaries (preprint IBRAE199506)
Preprint IBRAE9506
Aksenova A.E., Chudanov V.V., Vabishchevich P.N.
The quasisteady natural convection of a heatgenerating fluid with regard to solidification for the different cooling regimes on the boundaries is investigated numerically in present work. The main goal of this paper is investigation of different cooling regimes influence on the distribution of heat flux on the cavity boundaries.
To solve unsteady problems of hydrodynamics with heat conductivity, new efficient numerical method, inspected at the wide set of test problem, was employed. The obtained numerical results were verified on reability via conducting of calculations on the sequence of the fine grids.
These results may be used for construction of simplified models describing the behaviour of a molten heatgenerating masses (corium) in different retention system(core catcher).
Bibliographical reference
Aksenova A.E., Chudanov V.V., Vabishchevich P.N. NUMERICAL INVESTIGATION OF A HEATGENERATING FLUID WITH REGARD SOLIDIFICATION FOR DIFFERENT COOLING REGIMES ON THE BOUNDARIES (in Russian). – Preprint ¹ IBRAE9506. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 21 p. – Refs.: 17 items 
  Program system RCS: organization of calculations for modeling of physics problems (preprint IBRAE199505)
Preprint IBRAE9505
Varenkov V.V., Pervichko V.A., Popkov A.G., Chudanov V.V.
This paper describes a program system for organization of problem solving in field of mathematical physics. Principles of manipulations with calculation modules and data are considered. System structure and types of handled objects are described. An example demonstrates the organization of computing environment.
Bibliographical reference
Varenkov V.V., Pervichko V.A., Popkov A.G., Chudanov V.V. PROGRAM SYSTEM RCS: ORGANIZATION OF CALCULATIONS FOR MODELING OF PHYSICS PROBLEMS (in Russian). Preprint IBRAE9505. Moscow. Nuclear Safety Institute. 1995. 16 p. – Refs.: 6 items. 
  Numerical investigation of the heat exchange in a heatgenerating fluid with regard to solidification (preprint IBRAE199504)
Preprint IBRAE9504
Aksenova A.E., Chudanov V.V., Vabishchevich P.N.
The quasisteady natural convection of a heatgenerating fluid with phase changes in the enclosures of a square section with isothermal boundary conditions is investigated numerically in present work. The main goal of this paper is correlation relations for heat fluxes distribution at the domain boundaries depending on Rayleigh and Ostrogradskii numbers.
To solve unsteady problems of hydrodynamics with heat conductivity, new efficient numerical method, inspected at the wide set of test problem, was employed. The obtained numerical results were verified on reability via conducting of calculations on the sequence of the fine grids.
These results may be used for construction of simplified models describing the behaviour of a molten heatgenerating masses (corium) in different retention system(core catcher).
Bibliographical reference
Aksenova A.E., Chudanov V.V., Vabishchevich P.N. NUMERICAL INVESTIGATION OF THE SOME SINGULARITIES OF A HEATGENERATING FLUID BEHAVIOR WITH REGARD TO SOLIDIFICATION (in Russian). – Preprint ¹ IBRAE9504. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 21 p. – Refs.: 16 items 
  Numerical simulation the buoyancy driven flow of the stratified heatgenerating fluid (preprint IBRAE199503)
Preprint IBRAE9503
Aksenova A.E., Chudanov V.V., Strizhov V.F., Vabishchevich P.N.
The 2D natural convection of a heatgenerating fluid in a stratified corium for the different regimes of cooling on the upper boundary in a geometric domain similar to the vessel lower head is investigated numerically in present work. This paper deals to the analysis of the corium nonhomogeneity influence on the heat flux distribution on the lateral, lower and upper surfaces in depending on the cooling regimes at the upper boundary (Biot number) and different aspect ratio. To solve unsteady problems of hydrodynamics with heat conductivity, new efficient numerical method, inspected at the wide set of test problem, was employed. These results may be used for construction of simplified models describing the behaviour of a molten heatgenerating masses (corium) in different retention system(core catcher).
Bibliographical reference
Aksenova A.E., Chudanov V.V., Strizhov V.F., Vabishchevich P.N. NUMERICAL SIMULATION THE BUOYANCY DRIVEN FLOW OF THE STRATIFIED HEATGENERATING FLUID (in Russian). – Preprint ¹ IBRAE9503. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 18 p. – Refs.: 10 items 
  Numerical investigation of the heat exchange in a heatgenerating fluid with melting and solidification depending on Ostrogradskii and Rayleigh numbers (preprint IBRAE199501)
Preprint IBRAE9501
Aksenova A.E., Chudanov V.V., Vabishchevich P.N.
The quasisteady natural convection of a heatgenerating fluid with phase changes in the enclosures of a square section with isothermal boundary conditions is investigated numerically in present work. The main goal of this paper is correlation relations for heat fluxes distribution at the domain boundaries depending on Rayleigh and Ostrogradskii numbers.
To solve unsteady problems of hydrodynamics with heat conductivity, new efficient numerical method, inspected at the wide set of test problem, was employed. The obtained numerical results were verified on reability via conducting of calculations on the sequence of the fine grids.
These results may be used for construction of simplified models describing the behaviour of a molten heatgenerating masses (corium) in different retention system(core catcher).
Bibliographical reference
Aksenova A.E., Chudanov V.V., Vabishchevich P.N. NUMERICAL INVESTIGATION OF THE HEAT EXCHANGE IN A HEATGENERATING FLUID WITH MELTING AND SOLIDIFICATION DEPENDING ON OSTROGRADSKII AND RAYLEIGH NUMBERS. – Preprint ¹ IBRAE9501. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1995. – 25 p. – Refs.: 21 items 
  The interactive preprocessor for data generation in application to mathematical physics problems (preprint IBRAE NSI3294)
Preprint IBRAE ¹ NSI3294
Aksenova À.Å., Varenkov V.V., Pervichko V.A., Popkov A.G., Chudanov V.V.
In this paper an interactive preprocessor program intended for data generation in application to mathematical physics problems is described. The process of generation of computational regions, grids and boundary conditions with help of package is considered.
Bibliographical reference
Aksenova À.Å., Varenkov V.V., Pervichko V.A., Popkov A.G., Chudanov V.V. THE INTERACTIVE PREPROCESSOR FOR DATA GENERATION IN APPLICATION TO MATHEMATICAL PHYSICS PROBLEMS (in Russian). Preprint NSI3294. Moscow: Nuclear Safety Institute, 1994. 17 p. – Refs.: 7 items. 
  Models Of Radionuclides Transport In Atmosphere From Integrated Software Package «NOSTRADAMUS» (preprint IBRAE NSI3194)
Preprint IBRAE NSI3194
Arutunjan R.V., Bolshov L.A., Belikov V.V., Belikova G.V., Goloviznin V.M., Fokin A.L, Kanevsky M.F., Peschany S.E., Semenov V.N., Shilkova S.V, Sorokovikova O.S., Starodubtseva L.P.
The characteristics of the radionuclides transport model imbedded into the NOSTRADAMUS integrated software package of the Nuclear Safety Institute are described.
Bibliographical reference
Arutunjan R.V., Bolshov L.A., Belikov V.V., Belikova G.V., Goloviznin V.M., Fokin A.L, Kanevsky M.F., Peschany S.E., Semenov V.N., Shilkova S.V, Sorokovikova O.S., Starodubtseva L.P. MODELS OF RADIONUCLIDES TRANSPORT IN ATMOSPHERE FROM INTEGRATED SOFTWARE PACKAGE «NOSTRADAMUS». Preprint NSI3194. Moscow. Nuclear Safety Institute. September 1994. 23 p. – Refs.: 33 items 
  Numerical simulation of the natural convection in porous medium (preprint IBRAE NSI3394)
Preprint IBRAE NSI3394
Aksenova A.E., Chudanov V.V., Vabishchevich P.N.
A numerical algorithm is described in the work for 2D convection problem of fluid in porous medium in the stream function — vorticity — temperature formulation. Numerical implementation of the operatorsplitting scheme used in calculations is based on the solution of elliptic grid problems at every timelevel. The algorithm validation is conducted on the benchmark solutions for buoyancydriven flow of fluid in a square cavity with side walls of different temperatures.
Bibliographical reference
Aksenova A.E., Chudanov V.V.,Vabishchevich P.N. NUMERICAL SIMULATION OF THE NATURAL CONVECTION IN POROUS MEDIUM. – Preprint ¹ ¹ NSI3394. Moscow: Nuclear Safety Institute of the Russian Academy of Sciences (IBRAE RAN), 1994. – 22 p. – Refs.: 12 items 
  Comparative Analysis of Spatial Interpollation Methods by Using Chernobyl Fallout Data (in Russian) (preprint IBRAE NSI2694)
Preprint IBRAE NSI2694
Arutyunyan R.V., Bolshov L.A., Kanevsky Ì.F., Linge I.I., Savel’eva E.A.
The spatial data analysis of the Chernobyl fallout by using different methods is presented. Results of the crossvalidation and prediction maps are described. Several recommendations for the selection of the model and modeldependent parameters are discussed.
Bibliographical reference
Arutyunyan R.V., Bolshov L.A., Kanevsky Ì.F., Linge I.I., Savel’eva E.A. COMPARATIVE ANALYSIS OF SPATIAL INTERPOLLATION METHODS BY USING CHERNOBYL FALLOUT DATA. (in Russian). Preprint NSI2694. Moscow: Nuclear Safety Institute, August 1994. 43 p. – Refs.: 22 items 
  Sample Geostatistical Analysis of Chernobyl Fallout (preprint IBRAE NSI2594)
Preprint IBRAE NSI2594
Arutyunyan R.V., Bolshov L.A., Demyanov V.V., Kanevsky Ì.F., Linge I.I.
One of the approaches to the spatial data analysis is presented in the work. The following methods were sequentially applied to the Chenobyl data: cell declustering, moving window statistics, structural analysis, crossvalidation and kriging. Anysotropical case was under special concern, as well as comparison between isotropic and anisotropic modelling. Ordinary kriging results were compared with classical inverse distance squared interpolation. All used methods are fully and clearly described.
Bibliographical reference
Arutyunyan R.V., Bolshov L.A., Demyanov V.V., Kanevsky Ì.F., Linge I.I. SAMPLE GEOSTATISTICAL ANALYSIS OF CHERNOBYL FALLOUT (in Russian). Preprint NSI2594. Moscow. Nuclear Safety Institute. 1994. 47 p. – Refs.: 16 items 

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