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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
IMPACT OF THE HEAT TRANSFER COEFFICIENT OF THE EXTERNAL MEDIUM, CORRECTIONS OF THE VISCOSITY AND PRESSURE ON A SIMULATION OF A RESTART USING OPENFOAM
Submission Author:
Vitor Ventura , RJ
Co-Authors:
Vitor Ventura, Roney Thompson
Presenter: Vitor Ventura
doi://10.26678/ABCM.ENCIT2020.CIT20-0447
Abstract
This work aims to evaluate the impact of the heat transfer coefficient, number of iterations to correct the viscosity and the pressure fall on a simulation of a restart. A solver that resolves the energy, momentun and continuity equations were implemented in the OpenFOAM platform. This solver can enter in another iteration if the variation of the viscosity is too great. Simulations of restart of a thermo-viscoplastic were made and the impact of the variation of three parameters were evaluated: transfer heat coefficient of the external medium, number of iteration to correct the viscosity and pressure fall in the tube. In the simulations, there was a clear distinction between a high temperature, low viscosity region and a low temperature, high viscosity region. For higher heat transfer coefficients, the region of low viscosity is more concentrated in the center of the tube. For a smaller pressure fall, the frontier of the two regions begins to blur. The effect of the number of iterations to correct the viscosity is negligible
Keywords
Restart, OpenFOAM, Thermo-Viscoplastic
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