Search Results for author: Omar K. Matar

Found 9 papers, 5 papers with code

Solving the Discretised Multiphase Flow Equations with Interface Capturing on Structured Grids Using Machine Learning Libraries

1 code implementation12 Jan 2024 Boyang Chen, Claire E. Heaney, Jefferson L. M. A. Gomes, Omar K. Matar, Christopher C. Pain

The idea comes from the observation that convolutional layers can be used to express a discretisation as a neural network whose weights are determined by the numerical method, rather than by training, and hence, we refer to this approach as Neural Networks for PDEs (NN4PDEs).

A machine learning approach to the prediction of heat-transfer coefficients in micro-channels

no code implementations28 May 2023 Tullio Traverso, Francesco Coletti, Luca Magri, Tassos G. Karayiannis, Omar K. Matar

The accurate prediction of the two-phase heat transfer coefficient (HTC) as a function of working fluids, channel geometries and process conditions is key to the optimal design and operation of compact heat exchangers.

GPR regression

Generalised Latent Assimilation in Heterogeneous Reduced Spaces with Machine Learning Surrogate Models

no code implementations7 Apr 2022 Sibo Cheng, Jianhua Chen, Charitos Anastasiou, Panagiota Angeli, Omar K. Matar, Yi-Ke Guo, Christopher C. Pain, Rossella Arcucci

The new approach is tested on a high-dimensional CFD application of a two-phase liquid flow with non-linear observation operators that current Latent Assimilation methods can not handle.

BIG-bench Machine Learning

Rule-based Evolutionary Bayesian Learning

1 code implementation28 Feb 2022 Themistoklis Botsas, Lachlan R. Mason, Omar K. Matar, Indranil Pan

In our previous work, we introduced the rule-based Bayesian Regression, a methodology that leverages two concepts: (i) Bayesian inference, for the general framework and uncertainty quantification and (ii) rule-based systems for the incorporation of expert knowledge and intuition.

Bayesian Inference Uncertainty Quantification

An AI-based Domain-Decomposition Non-Intrusive Reduced-Order Model for Extended Domains applied to Multiphase Flow in Pipes

1 code implementation13 Feb 2022 Claire E. Heaney, Zef Wolffs, Jón Atli Tómasson, Lyes Kahouadji, Pablo Salinas, André Nicolle, Omar K. Matar, Ionel M. Navon, Narakorn Srinil, Christopher C. Pain

The whole framework is applied to multiphase slug flow in a horizontal pipe for which an AI-DDNIROM is trained on high-fidelity CFD simulations of a pipe of length 10 m with an aspect ratio of 13:1, and tested by simulating the flow for a pipe of length 98 m with an aspect ratio of almost 130:1.

Dimensionality Reduction

Direct numerical simulations of transient turbulent jets: vortex-interface interactions

no code implementations3 Dec 2020 Cristian R. Constante-Amores, Lyes Kahouadji, Assen Batchvarov, Seungwon Shin, Jalel Chergui, Damir Juric, Omar K. Matar

The thinning of the lobes induces the creation of holes which expand to form liquid threads that undergo capillary breakup to form droplets.

Fluid Dynamics

Applying Convolutional Neural Networks to Data on Unstructured Meshes with Space-Filling Curves

1 code implementation24 Nov 2020 Claire E. Heaney, Yuling Li, Omar K. Matar, Christopher C. Pain

The space-filling curves (SFCs) are used to find an ordering of the nodes or cells that can transform multi-dimensional solutions on unstructured meshes into a one-dimensional (1D) representation, to which 1D convolutional layers can then be applied.

Image Classification Image Compression

Numerical simulation, clustering and prediction of multi-component polymer precipitation

1 code implementation10 Jul 2020 Pavan Inguva, Lachlan Mason, Indranil Pan, Miselle Hengardi, Omar K. Matar

To reduce the required computational costs, we apply machine learning techniques for clustering and consequent prediction of the simulated polymer blend images in conjunction with simulations.

BIG-bench Machine Learning Clustering +2

Data-driven surrogate modelling and benchmarking for process equipment

no code implementations13 Mar 2020 Gabriel F. N. Gonçalves, Assen Batchvarov, Yuyi Liu, Yuxin Liu, Lachlan Mason, Indranil Pan, Omar K. Matar

In chemical process engineering, surrogate models of complex systems are often necessary for tasks of domain exploration, sensitivity analysis of the design parameters, and optimization.

Active Learning Benchmarking +2

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