[HTML][HTML] Physics informed neural networks: A case study for gas transport problems

EL Strelow, A Gerisch, J Lang, ME Pfetsch - Journal of Computational …, 2023 - Elsevier
Physics informed neural networks have been recently proposed and offer a new promising
method to solve differential equations. They have been adapted to many more scenarios …

Nonlinear dynamic behavior analysis of dual-rotor-bearing systems with looseness and rub–impact faults

K Lu, D Guo, W Zhu, Y Jin, H Cheng, X Gu, C Fu - AIAA Journal, 2023 - arc.aiaa.org
The nonlinear dynamic behaviors of dual-rotor-bearing systems with looseness and rub–
impact faults are discussed in this paper. The dual-rotor-bearing system with looseness and …

Efficient wildland fire simulation via nonlinear model order reduction

F Black, P Schulze, B Unger - Fluids, 2021 - mdpi.com
We propose a new hyper-reduction method for a recently introduced nonlinear model
reduction framework based on dynamically transformed basis functions and especially well …

Transitions from monotonicity to chaos in gas mixture dynamics in pipeline networks

LS Baker, SR Kazi, A Zlotnik - PRX Energy, 2023 - APS
The blending of hydrogen generated using clean energy into natural gas pipeline networks
is proposed in order to utilize existing energy systems for their planned lifetimes while …

On snapshot-based model reduction under compatibility conditions for a nonlinear flow problem on networks

B Liljegren-Sailer, N Marheineke - Journal of Scientific Computing, 2022 - Springer
This paper is on the construction of structure-preserving, online-efficient reduced models for
the barotropic Euler equations with a friction term on networks. The nonlinear flow problem …

Equal-weight and rank-sum-weight-based systematic diminution of higher-order continuous systems using grey wolf optimisation

UK Yadav, N Patnana, VP Meena… - International Journal of …, 2023 - inderscienceonline.com
The order-diminution techniques are adopted in various fields of engineering and
applications to reduce the order of systems from higher-order to desired lower-order. In this …

Optimal Control of Transient Flows in Pipeline Networks with Heterogeneous Mixtures of Hydrogen and Natural Gas

LS Baker, SR Kazi, RB Platte… - 2023 American Control …, 2023 - ieeexplore.ieee.org
We formulate a control system model for the distributed flow of mixtures of highly
heterogeneous gases through large-scale pipeline networks with time-varying injections of …

emgr – EMpirical GRamian Framework Version 5.99

C Himpe - ACM Transactions on Mathematical Software, 2023 - dl.acm.org
Version 5.99 of the empirical Gramian framework–emgr–completes a development cycle
which focused on parametric model order reduction of gas network models while preserving …

Error analysis for Galerkin-BDF discretizations of DAEs with elliptic operator constraints

D Groh, C Tischendorf - Journal of Computational and Applied Mathematics, 2023 - Elsevier
We are interested in a convergent numerical discretization scheme for nonlinear differential
algebraic equations (DAEs) coupled with elliptic constraints. The dynamics of flow networks …

Linear System Analysis and Optimal Control of Natural Gas Dynamics in Pipeline Networks

LS Baker, S Shivakumar, D Armbruster… - arXiv preprint arXiv …, 2023 - arxiv.org
We derive a linear system of ordinary differential equations (ODEs) to approximate the
dynamics of natural gas in pipeline networks. Although a closed-form expression of the …