RE: Issues with Grid Generation

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Noelani Villa, modified 3 Years ago.

Issues with Grid Generation

Youngling Post: 1 Join Date: 10/14/21 Recent Posts

Hi I created a land boundry layer from google earth (kmz) and converted it to a shapefile in ArcMap. Using the ESRI shapefile importer on Delft3D FM I was able to import the file and re-save it as a land boundry layer (.lbd) However, when I go to Grid and generate the splines I am unable to use the "grow grid from splines" feature. It allows me to use the "change splines to grid" feature. I select a New Domain when I try to generate the grid and ensure that I am not stuck in editing mode. Also, I ensure my coordinate system is cartesian. I also do the clicking on the empty space multiple times to clear the cache. Has anyone had this issue before? Any insights you can offer?

Dmitry Kushnir, modified 3 Years ago.

RE: Issues with Grid Generation

Padawan Posts: 25 Join Date: 11/9/12 Recent Posts

Hi Noelani,
Check this video podcasts on creating unstructured grids in RGFGRID:
https://oss.deltares.nl/web/delft3dfm/-/video-grid-generation-unstructured-mesh?redirect=%2Fweb%2Fdelft3dfm%2Fscreen-casts
https://oss.deltares.nl/web/delft3dfm/-/video-advanced-grid-generation-unstructured-grids-for-the-sand-engine?redirect=%2Fweb%2Fdelft3dfm%2Fscreen-casts
These will help you to clear things up a bit.
Regards,
Dmitry

Gilbert M, modified 3 Years ago.

RE: Issues with Grid Generation

Youngling Post: 1 Join Date: 1/4/22 Recent Posts

The grid generation issues found in the 3D simulation of two-phase flow in a pipe using Computational Fluid Dynamics (CFD) are discussed in this paper. Special attention is given to the effect of the element type and structure of the mesh. The simulations were carried out using the commercial software package STAR-CCM+, which is designed for numerical simulation of continuum mechanics problems. The model consisted of a cylindrical vertical pipe. Different mesh structures were employed in the computational domain. The condition of two-phase flow was simulated with the Volume of Fluid (VOF) model, taking into consideration turbulence effects using the k-e model. The results showed that there is a strong dependency of the flow behaviour on the mesh employed. The best result was obtained with the grid known as butterfly grid, while the cylindrical mesh produced misleading results. The simulation was validated against experimental results.