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Tag: CFD

Air Assist Nozzle for Laser Cutter

Nejc November 6, 2020 November 8, 2020Uncategorized CFD, laser cutting, OpenFOAM 1

I solved the problem with burn marks on Klarart‘s laser cutter. Here is the blog post about details. At the end, I mentioned that the air assist nozzle might not…

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OpenFOAM and DAKOTA: a Complete Guide

Nejc October 17, 2020 November 1, 2020Uncategorized blockMesh, CFD, DAKOTA, OpenFOAM, snappyHexMesh, wind turbine 0

Running a single CFD simulation rarely provides enough information to find a good hydraulic or aerodynamic design of a component. In many cases the poor engineer has to wrestle an…

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A Parametric CFD Model: Wind Turbine from Pipes

Nejc October 17, 2020 November 1, 2020Uncategorized blockMesh, CFD, DAKOTA, OpenFOAM, snappyHexMesh, wind turbine 2

I’m building a wind turbine and as you might imagine, the blades are Ye Royale Paine In Me Buttocks. Too big for a CNC, too exposed for a 3D print,…

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RunFunctions: a Quick Cheatsheet

Nejc October 3, 2020 November 1, 2020Uncategorized CFD, OpenFOAM 2

All OpenFOAM tutorials have Allrun and Allclean scripts which call some mysterious RunFunctions from even more mysterious sources. The most mysterious thing of all this is how poorly those are…

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Classy Classes for blockMesh

Nejc February 2, 2020 November 1, 2020Uncategorized blockMesh, CFD, OpenFOAM 1

IMPORTANT! classy_blocks have been massively improved but this article hasn’t. Please refer to readme in repository for most up-to-date information and examples. blockMesh: pros and cons blockMesh is a great…

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Tesla Cybertruck Aerodynamics

Nejc December 10, 2019 November 1, 2020Uncategorized aerodynamics, CFD, drag, OpenFOAM 0

I am not going to share my negative opinion on visual aspects of design of this vehicle (although I could be very verbose) but there are some technical issues I…

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SALOME for multiregion meshing

Nejc September 15, 2019 November 1, 2020Uncategorized CFD, OpenFOAM, SALOME 3

Context If you’re creating a multiregion mesh and you found this article you probably already know what SALOME , OpenFOAM, snappyHexMesh and chtMultiRegionFoam mean. In case you dont’ here’s a…

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Truck Aerodynamics

Nejc June 7, 2019 November 1, 2020Uncategorized aerodynamics, CFD, drag, OpenFOAM 0

Practical Background Our intuition will tell us that sharp or rounded objects will cause less drag when moving through fluid. Slightly less intuitive is the fact that changing the rear…

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