# CFD Convergence Problems

**URL:** <https://www.simscale.com/forum/t/cfd-convergence-problems/74367>\
**Category:** Fluid Flow / CFD\
**Created:** [June 29, 2017, 10:58pm UTC](https://www.simscale.com/forum/t/cfd-convergence-problems/74367 "2017-06-29T22:58:47Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mas985](https://www.simscale.com/forum/letter_avatar/mas985/32/5_5575768a8748004e209b776fc1b2916d.png) [@mas985](https://www.simscale.com/forum/u/mas985)\
**Post date:** [June 29, 2017, 10:58pm UTC](https://www.simscale.com/forum/t/cfd-convergence-problems/74367/1 "2017-06-29T22:58:47Z")

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I am simulating a pump basket which has one inlet, one outlet and a volume area. It would seem to be fairly simple but the convergence was not that great:

 ![](https://www.simscale.com/forum/uploads/default/original/2X/3/3ee609d82c414c43ee5ed21a06d648b97dff9ad5.png)

Also, when I look at the streamtracer, there are traces outside of the volume:

 ![](https://www.simscale.com/forum/uploads/default/original/2X/b/b23b7d994e239939df0511f8d485bd98c750256d.jpg)

Here is a link to the public project:

> **[SimScale Login](https://www.simscale.com/workbench?publiclink=2e5706e4-e769-424e-a105-8a2873ed8b93)**
>
> Log in to your SimScale account. SimScale makes high-fidelity engineering simulation technically and economically accessible. At any scale. In the cloud.

Any suggestions?