Digital twin models reduce costs and mirror fluid dynamics accurately
High-Fidelity Digital Twin Data Models by Randomized Dynamic Mode Decomposition and Deep Learning with Applications in Fluid Dynamics
Machine Learning
Summary
Simulating complex fluid movements, like shock waves, usually takes a lot of computing power and time. The author shows how to create simpler models called digital twins that copy these fluid behaviors very closely but run much faster and use less hardware. This is done by combining two techniques: one that breaks down the data efficiently and another that uses deep learning to understand patterns. Testing on simulations of different shock waves proves these models are both accurate and efficient.
What this means in practice
- •For computational fluid dynamics engineers: Create faster reduced models for simulating complex fluid behaviors without modifying original simulation codes.
- •For aerospace design teams: Speed up testing of shock wave effects on designs by using high-fidelity digital twin data models that lower computational costs.
Authors
Diana A. Bistrian
Abstract
The purpose of this paper is the identification of high-fidelity digital twin data models from numerical code outputs by non-intrusive techniques (i.e., not requiring Galerkin projection of the governing equations onto the reduced modes basis). In this paper the author defines the concept of the digital twin data model (DTM) as a model of reduced complexity that has the main feature of mirroring the original process behavior. The significant advantage of a DTM is to reproduce the dynamics with high accuracy and reduced costs in CPU time and hardware for settings difficult to explore because of the complexity of the dynamics over time. This paper introduces a new framework for creating efficient digital twin data models by combining two state-of-the-art tools: randomized dynamic mode decomposition and deep learning artificial intelligence. It is shown that the outputs are consistent with the original source data with the advantage of reduced complexity. The DTMs are investigated in the numerical simulation of three shock wave phenomena with increasing complexity. The author performs a thorough assessment of the performance of the new digital twin data models in terms of numerical accuracy and computational efficiency.