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CONSEN

CONSEN. DEVELOPED FOR A PERSONAL COMPUTER A CENTRAL VOLUME plus N VOLUMES CONNECTED MULTI-FLUIDS SIMULATION CRYOGENIC CONDITIONS ICE FORMATION INTERNAL AND BOUNDARY STRUCTURES JUNCTIONS AND VALVES FIXED CONDITIONS VOLUMES INTERNAL AND EXTERNAL HEAT TRANSFER RADIATION BETWEEN STRUCTURES

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CONSEN

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  1. CONSEN • DEVELOPED FOR A PERSONAL COMPUTER • A CENTRAL VOLUME plus N VOLUMES CONNECTED • MULTI-FLUIDS SIMULATION • CRYOGENIC CONDITIONS • ICE FORMATION • INTERNAL AND BOUNDARY STRUCTURES • JUNCTIONS AND VALVES • FIXED CONDITIONS VOLUMES • INTERNAL AND EXTERNAL HEAT TRANSFER • RADIATION BETWEEN STRUCTURES • CRITICAL FLOW • CHEMICAL REACTIONS • AUTOMATIC TIME STEP CONTROL • ON-LINE INFORMATION DURING CALCULATIONS A COMPUTER PROGRAM FOR TRANSIENT SIMULATION OF ENERGY AND MASS TRANSFER BETWEEN INTERCONNECTED VOLUMES

  2. from volume i-1 FIXED CONDITION VOLUME flashing VAPOUR/GAS FLOW RATE volume i STRUCTURE interfacial mass HEAT exchange LIQUID to volume i+1 • NATURAL CONVECTION • BOILING • CONSENSATION • JET IMPINGEMENT HEAT TRANSFER • ICE FORMATION • DIFFUSION AT THE LIQUID/ATMOSPHERE INTERFACE • USER DEFINED HTC • WATER (0.1 - 1500 K) • HELIUM (2.2 - 1500 K) • OXYGEN (T > 54.4 K) • NITROGEN (T > 0.1 K) • HYDROGEN (GAS) • AIR • OTHER GAS

  3. JUNCTIONS SIMULATION CRITICAL FLOW • SIMPLE CONNECTION, VALVE OR BREAK SIMULATION • FLOW AREA vs TIME • FLOW RATE vs TIME or Dp • ACTUATION TIME • ACTUATION P OR T • CHECK VALVE • P COEFFICIENT vs TIME • GAS • HIGH SUBCOOLING • FLASHING (LOW SUB.) • TWO PHASE (H.M.) STRUCTURES SIMULATION • FINITE DIFF. IMPLICIT METHOD (FOURIER EQ. 1-D, 2_D for target) • INTERNAL POWER SOURCE • DIFFERENT GEOMETRY: SLAB, CYLINDER, SPHERE • MULTILAYER STRUCTURES • INTERNAL STRUCTURES • BOUNDARY STRUCTURES STRUCTURE MATERIALS • CONCRETE • CARBON STEEL • STAINLESS STEEL • COPPER • GRAPHITE • BERYLLIUM • TUNGSTEN • INSULANTS • SUPERCONDUCTORS • INPUT DEFINED MATERIALS CHEMICAL REACTIONS • BERYLLIUM-STEAM • BERYLLIUM-AIR • GRAPHITE-STEAM • GRAPHITE-AIR • TUNGSTEN-STEAM • TUNGSTEN-AIR

  4. CONSEN v 5.0 NODALIZATION - The version 5.0 has been developed to allow the model of several compartments connected according to a free topology defined by the user, so that all the compartments can be connected, through junctions, to all the other volumes. This overcomes the limitation of the previous versions of the code in which a maximum of six volumes could be connected only to a "central" compartment. CONSEN 5 nodalization example

  5. TRITIUM - A simple model to evaluate tritium migration between the compartments has been implemented too in CONSEN 5.0. The tritium flow between two connected volumes is evaluated multiplying the tritium volumetric concentration in the compartment (assumed uniform only in the atmosphere region) and the volumetric flow rate evaluated by the existing models in CONSEN. In CONSEN allthe tritium is considered in HTO form diluted in the steam and in the atmosphere. It is treated ,at the present, as a gas (it does not condense on cold surfaces). ICE - A model to evaluate ice porosity during formation and its influence on density and thermal conductivity has been implemented. Some modification in the iterative algorithms for the ice thickness evaluation has been introduced.

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