TY - JOUR

T1 - Experimental and Numerical Investigations into Heat Transfer Using a Jet Cooler in High-Pressure Die Casting

AU - Bohacek, Jan

AU - Mraz, Krystof

AU - Krutis, Vladimir

AU - Kana, Vaclav

AU - Vakhrushev, Alexander

AU - Karimi Sibaki, Ebrahim

AU - Kharicha, Abdellah

N1 - Computational resources were supplied by the project “e-Infrastruktura CZ” (e-INFRA CZ LM2018140) and supported by the Ministry of Education, Youth and Sports of the Czech Republic. Computational resources were provided by the ELIXIR-CZ project (LM2018131), part of the international ELIXIR infrastructure. The authors declare no conflict of interest.

PY - 2023/11/28

Y1 - 2023/11/28

N2 - During high-pressure die casting, a significant amount of heat is dissipated via the liquid-cooled channels in the die. The jet cooler, also known as the die insert or bubbler, is one of the most commonly used cooling methods. Nowadays, foundries casting engineered products rely on numerical simulations using commercial software to determine cooling efficiency, which requires precise input data. However, the literature lacks sufficient investigations to describe the spatial distribution of the heat transfer coefficient in the jet cooler. In this study, we propose a solver using the open-source CFD package OpenFOAM and free library for nonlinear optimization NLopt for the inverse heat conduction problem that returns the desired distribution of the heat transfer coefficient. The experimental temperature measurements using multiple thermocouples are considered the input data. The robustness, efficiency, and accuracy of the model are rigorously tested and confirmed. Additionally, temperature measurements of the real jet cooler are presented.

AB - During high-pressure die casting, a significant amount of heat is dissipated via the liquid-cooled channels in the die. The jet cooler, also known as the die insert or bubbler, is one of the most commonly used cooling methods. Nowadays, foundries casting engineered products rely on numerical simulations using commercial software to determine cooling efficiency, which requires precise input data. However, the literature lacks sufficient investigations to describe the spatial distribution of the heat transfer coefficient in the jet cooler. In this study, we propose a solver using the open-source CFD package OpenFOAM and free library for nonlinear optimization NLopt for the inverse heat conduction problem that returns the desired distribution of the heat transfer coefficient. The experimental temperature measurements using multiple thermocouples are considered the input data. The robustness, efficiency, and accuracy of the model are rigorously tested and confirmed. Additionally, temperature measurements of the real jet cooler are presented.

KW - die casting

KW - jet cooling

KW - jet cooler

KW - bubbler

KW - bayonet

KW - die inser

KW - OpenFOAM

KW - NLopt

KW - IHCP

KW - concave surface

KW - spherical surface

U2 - 10.3390/jmmp7060212

DO - 10.3390/jmmp7060212

M3 - Article

VL - 7.2023

JO - Journal of Manufacturing and Materials Processing

JF - Journal of Manufacturing and Materials Processing

SN - 2504-4494

IS - 6

M1 - 212

ER -