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S25 Métodos Numéricos |
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Title:
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A NEW COMPUTATIONAL ALGORITHM FOR THERMAL-HYDRAULICS ANALYSIS OF INDUSTRIAL PLANTS
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Summary :
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THIS WORK PRESENTS AN ORIGINAL ALGORITHM USING A NUMERICAL SOLUTION SCHEME OF A PHYSICAL MODEL REPRESENTING THE THERMAL-HYDRAULIC BEHAVIOR OF AN INDUSTRIAL PLANT. THIS MODEL IS DESCRIBED BY ONE DIRECTION EQUATION IN THE PREFERRED FLOW DIRECTION. A HOMOGENEOUS FLUID SLIP MODEL IN THERMAL DYNAMIC EQUILIBRIUM IS ASSURED. THE ALGORITHM PRESENTS A TOTALLY IMPLICIT AND ITERATIVE SCHEME IN TIME, WHEN NO REVERSE FLOW OCCURS. IT IS RECURRENT IN SPACE, PRODUCING A MARCHING ALGORITHM IN SPACE. RESULTS ARE PRESENTED FOR TWO TEST CASES. THE FIRST ONE WAS COMPARED TO RELAP5/MOD3.2 RESULTS. THE SECOND CASE WAS COMPARED TO AN ANALYTICAL SOLUTION. BOTH RESULTS SHOWED LOW ABSOLUTE ERRORS, NO NUMERICAL DIFFUSION AN REAL TIME PROCESSING. |
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Author :
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Alvim, Antonio Carlos Marques
Carmo, Eduardo Gomes
Lapa, Nelbia da Silva
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Paper View :
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