![]() In addition to this, 3D twist models will show you that although the field and loss distribution is a bit different in 3D, the lumped quantities (the resistance and inductance) computed by 2D and 2.5D models are actually quite accurate. This part of the series builds on the previous two tutorials, which show that there is a weak coupling between the inductive and capacitive parts of the cable. Total Accumulated Charging Current at Ground Point/Intersection The Bonding Capacitive tutorial analyzes the current buildup for different bonding types as well as the corresponding losses. The charging currents that leak into the screen build up along the cable and reach a maximum at the ground point, or intersection. Right: The norm of the resulting charging current accumulated along the cable (for cross bonding). Left: The 2D axisymmetric geometry of an isolated phase with three separate bonding sections and a different scale for transverse and longitudinal directions. It shows you how to perform basic tasks, such as:įeel free to skip ahead if you feel these topics are old hat to you. This primer allows you to get acquainted with the user-friendly desktop environment of the COMSOL Multiphysics® software, and with numerical modeling in general. ![]() Licensed under CC BY-SA 3.0, via Wikimedia Commons. You’ll also get a detailed overview on what to expect in the other seven parts of the series.Ī submarine cable similar to the one modeled throughout this series. Part 1 of the tutorial series is where you meet the model - a three-core lead-sheathed XLPE HVAC (cross-linked polyethylene, high-voltage alternating current) submarine cable with a twisted magnetic armor. ![]() The beginning is a very good place to start, as most would say. Part 1: Introducing the Basics and Fundamentals of Cable Modeling The 3D twist models (Part 7 and 8) are discussed in another blog post: Using 3D Models to Investigate Inductive Effects in a Submarine Cable. Note that the models discussed in this blog post are 2D only (Part 1 to 6 of the series). It has since been updated to reflect the updated tutorial series. Keep reading for a sneak peek of what you’ll learn when you roll up your sleeves and start the series.Įditor’s note: This blog post was originally published on December 29, 2017. The numerical model is based on standard cable designs and validated by reported figures. The Cable Tutorial Series shows how to model an industrial-scale cable in the COMSOL Multiphysics® software and add-on AC/DC Module, and also serves as an introduction to modeling electromagnetic phenomena in general. If you want to check the entire model file, click the root node in the model tree.įor a full specification of features and products, please refer the the Specification Chart on the web:Want a roadmap to modeling cables? We have an eight-part tutorial series for you. If a feature is available in more that one add-on module and you are licensed to all of them, the first product key available will be shown in the properties section. You can do this also on boundary conditions and other features that require a certain product. ![]() Under the Used Products section you will see "COMSOL multiphysics" and "CFD Module". Example: If you have "Laminar Two-Phase flow, Level Set (tpf)", right-click that and select Properties. Here is the key: Right click a feature in the model tree and select Properties. Hi Ivar, I guess this problem gets more prominent the more modules you have licensed. The only thing: I'm getting lost in the multiplicity and splitting of the toolboxes/physics, as I'm using and mixing many, it's getting less obvious to understand which modules are required, probably that is the cost of true "multi-physics"
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