# Did I just run the samples correctly?

**URL:** <https://pyfr.discourse.group/t/did-i-just-run-the-samples-correctly/252>\
**Category:** Cases\
**Created:** [27 September 2019 06:32 UTC](https://pyfr.discourse.group/t/did-i-just-run-the-samples-correctly/252 "2019-09-27T06:32:19Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Mahmood\_Naderan](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@Mahmood\_Naderan](https://pyfr.discourse.group/u/Mahmood_Naderan)\
**Post date:** [27 September 2019 06:32 UTC](https://pyfr.discourse.group/t/did-i-just-run-the-samples-correctly/252/1 "2019-09-27T06:32:19Z")

</div>

Hi,  
I have run the following commands to build and run an example:

```auto
$ python3.6 setup.py install --prefix=/home/mahmood/.local
$ cd examples/couette_flow_2d/
$ pyfr import couette_flow_2d.msh couette_flow_2d.pyfrm
$ pyfr run --progress -b cuda couette_flow_2d.pyfrm couette_flow_2d.ini

```

And I see some files such as couette\_flow\_2d-018.pyfrs in the directory.  
Is that a normal run?  
May I know what did I run?! I am actually working on GPUs and I am not an expert in CFD terminology.

---

<div class="post-metadata">

**Author:** ![fdw](https://avatars.discourse-cdn.com/v4/letter/f/a587f6/32.png) [@fdw](https://pyfr.discourse.group/u/fdw)\
**Post date:** [28 September 2019 15:46 UTC](https://pyfr.discourse.group/t/did-i-just-run-the-samples-correctly/252/2 "2019-09-28T15:46:13Z")

</div>

Hi Mahmood,

You successfully ran the Couette flow test case as detailed in the PyFR  
user guide:

[http://pyfr.org/user\_guide.php](http://pyfr.org/user_guide.php)

Regards, Freddie.

---

<div class="post-metadata">

**Author:** ![Mahmood\_Naderan](https://avatars.discourse-cdn.com/v4/letter/m/839c29/32.png) [@Mahmood\_Naderan](https://pyfr.discourse.group/u/Mahmood_Naderan)\
**Post date:** [28 September 2019 17:43 UTC](https://pyfr.discourse.group/t/did-i-just-run-the-samples-correctly/252/3 "2019-09-28T17:43:13Z")

</div>

Thank you.  
I would like to increase the problem size. As I look at the ini file, I see no option related to, for example, number of particles.  
I don’t know how msh file is generated. I didn’t see such thing the tutorial section.  
Can you please guide how to generate another problem and data?