Shape manipulation of a rotating liquid liner imploded by arrays of pneumatic pistons: Experimental and numerical study

Mangione, Nicholas S.; Wu, Hao; Preston, Claire; Lee, Anthony M.D.; Entezami, Sohrab; Ségas, Raphaël; Forysinski, Piotr W.; Suponitsky, Victoria

doi:10.1016/j.fusengdes.2023.114087

Cited by 3 publications

References 26 publications

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An interface tracking, finite volume code for modeling axisymmetric implosion of a rotating liquid metal liner with free surface

Khalzov,

Krotez,

Ségas

2024

Physics of Fluids

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We present Integrated System Model-hydrodynamics (ISM-hydro)—an interface tracking, finite volume code for modeling a shaped implosion of a rotating, initially cylindrical, fluid shell (liner) with a free surface. The code is a novel implementation of the mixed Lagrangian–Eulerian approach, applied to a compressible fluid in an axisymmetric geometry described by cylindrical coordinates (r, ϕ, z). In ISM-hydro, a structured quadrilateral mesh follows fluid elements in the r-direction (radially Lagrangian) and is fixed in the z-direction (axially Eulerian). This approach accurately captures the motion of the liner's free surface, making it an interface tracking method. Using this mesh, we derive a finite volume discretization of the axisymmetric Euler equations for a rotating compressible fluid that has an exact balance of kinetic energy. An extensive comparison between ISM-hydro and the open-source software OpenFOAM is presented; results for different test cases show very good agreement in simulated implosion trajectories and flow fields. ISM-hydro is the purely hydrodynamic component of the Integrated System Model (ISM), a framework developed at General Fusion (GF) for comprehensive predictive modeling of GF's magnetized target fusion (MTF) scheme, where an imploding rotating liquid metal liner compresses a magnetized plasma target to fusion conditions. Among advantages of the code is its speed: a full implosion simulation with a coarse mesh takes on the order of one minute on a single core while preserving high accuracy. This makes ISM-hydro a valuable tool for the design optimization of GF's MTF machines.

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An interface tracking, finite volume code for modeling axisymmetric implosion of a rotating liquid metal liner with free surface

Khalzov,

Krotez,

Ségas

2024

Physics of Fluids

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Multibody dynamic simulation analysis of engine crank connecting rod mechanism

Wang,

Zhao

2024

Third International Conference on Mechatronics and Mechanical Engineering (ICMME 2024)

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The engine crank connecting rod mechanism is an important part of the engine and faces complex working conditions. In order to better analyse the structural principles of diesel engine components and to explore reasonable assembly paths, the basic parameters of a certain model of diesel engine used as reference, a three-dimensional model of each component of the engine crank connecting rod mechanism was constructed using CATIA software and product assembly was carried out. After the modeling was completed, based on known data and standard parameters, a theoretical analysis of the crank connecting rod mechanism was conducted in dynamics. The model was imported into ADAMS, and component constraints and appropriate driver programs were added. Multi body dynamics simulation was performed on the completed virtual prototype, obtaining AVI simulation animations and obtaining the motion change curves of the main components of the system. The virtual assembly and motion simulation of diesel engine crank connecting rod mechanism can clearly observe the structure of components and the action principle of diesel engine, verify the feasibility of assembly sequence and path of various components of large diesel engine, analyze the optimal assembly sequence, determine the optimal assembly path, improve the assembly quality of parts and final assembly, and reduce assembly costs.

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From Single Shot to Structure: End-to-End Network-Based Deflectometry for Specular Free-Form Surface Reconstruction

Sepanj,

Moradi,

Nazemi

et al. 2024

Applied Sciences

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Deflectometry is a key component in the precise measurement of specular (mirrored) surfaces; however, traditional methods often lack an end-to-end approach that performs 3D reconstruction in a single shot with high accuracy and generalizes across different free-form surfaces. This paper introduces a novel deep neural network (DNN)-based approach for end-to-end 3D reconstruction of free-form specular surfaces using single-shot deflectometry. Our proposed network, VUDNet, innovatively combines discriminative and generative components to accurately interpret orthogonal fringe patterns and generate high-fidelity 3D surface reconstructions. By leveraging a hybrid architecture integrating a Variational Autoencoder (VAE) and a modified U-Net, VUDNet excels in both depth estimation and detail refinement, achieving superior performance in challenging environments. Extensive data simulation using Blender leading to a dataset which we will make available, ensures robust training and enables the network to generalize across diverse scenarios. Experimental results demonstrate the strong performance of VUDNet, setting a new standard for 3D surface reconstruction.

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Shape manipulation of a rotating liquid liner imploded by arrays of pneumatic pistons: Experimental and numerical study

Cited by 3 publications

References 26 publications

An interface tracking, finite volume code for modeling axisymmetric implosion of a rotating liquid metal liner with free surface

An interface tracking, finite volume code for modeling axisymmetric implosion of a rotating liquid metal liner with free surface

Multibody dynamic simulation analysis of engine crank connecting rod mechanism

From Single Shot to Structure: End-to-End Network-Based Deflectometry for Specular Free-Form Surface Reconstruction

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