Database for Research Projects to Solve the Inverse Heat Conduction Problem

Abstract

To achieve the optimal performance of an object to be heat treated, it is necessary to know the value of the Heat Transfer Coefficient (HTC) describing the amount of heat exchange between the work piece and the cooling medium. The prediction of the HTC is a typical Inverse Heat Transfer Problem (IHCP), which cannot be solved by direct numerical methods. Numerous techniques are used to solve the IHCP based on heuristic search algorithms having very high computational demand. As another approach, it would be possible to use machine-learning methods for the same purpose, which are capable of giving prompt estimations about the main characteristics of the HTC function. As known, a key requirement for all successful machine-learning projects is the availability of high quality training data. In this case, the amount of real-world measurements is far from satisfactory because of the high cost of these tests. As an alternative, it is possible to generate the necessary databases using simulations. This paper presents a novel model for random HTC function generation based on control points and additional parameters defining the shape of curve segments. As an additional step, a GPU accelerated finite-element method was used to simulate the cooling process resulting in the required temporary data records. These datasets make it possible for researchers to develop and test their IHCP solver algorithms.

A thermal load identification method based on physics-guided neural network for honeycomb sandwich structures

“…The effectiveness and accuracy of the estimation were verified by numerical simulation and experiment. Szénási and Felde [20] proposed a database containing the heat transfer coefficient function and the corresponding temperature records for the heat exchange between the work piece and the cooling medium, and designed a simple feedforward dense neural network to solve the IHCP. Zielonka et al [21] proposed a method to solve the inverse problem of alloy solidification in casting mold based on metal shrinkage phenomenon.…”