# How to set Slip-BCs on PyFR? **URL:** \ **Category:** General\ **Created:** [23 April 2015 12:06 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64 "2015-04-23T12:06:48Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Antonio\_Garcia-Uceda](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Antonio\_Garcia-Uceda](https://pyfr.discourse.group/u/Antonio_Garcia-Uceda)\ **Post date:** [23 April 2015 12:06 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/1 "2015-04-23T12:06:48Z")
Dear all, My name is Antonio Garcia-Uceda, and I’m a researcher on Flux Reconstruction methods. I’m using pyFR as part of my project. My question is pretty simple. How can I set Slip BCs on PyFR (or Symmetry BCs)? I can’f find it in your documentation. Thanks in advance. Best regards, Antonio ---
**Author:** ![arvind\_iyer](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@arvind\_iyer](https://pyfr.discourse.group/u/arvind_iyer)\ **Post date:** [23 April 2015 13:55 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/2 "2015-04-23T13:55:55Z")
Hi Antonio, This feature is newly implemented in v0.3.0. The corresponding type is ‘slp-adia-wall’. You can see on[http://](http://www.pyfr.org/user_guide.php)[www.pyfr.org](http://www.pyfr.org/user_guide.php)[/](http://www.pyfr.org/user_guide.php)[user\_guide.php](http://www.pyfr.org/user_guide.php) under **soln-bcs-name**. Regards​ ---
**Author:** ![Antonio\_Garcia-Uceda](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Antonio\_Garcia-Uceda](https://pyfr.discourse.group/u/Antonio_Garcia-Uceda)\ **Post date:** [24 April 2015 08:02 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/3 "2015-04-24T08:02:29Z")
Dear Arvind, Thanks a lot for yor reply. Indeed I’m using pyFR-0.2.4 and I failed trying to set ‘slp-adia-wall’. On the other hand, Is it possible to set Inlet BCs as Stagnation properties: To and Po? Thanks once again. Best regards, Antonio ---
**Author:** ![arvind\_iyer](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@arvind\_iyer](https://pyfr.discourse.group/u/arvind_iyer)\ **Post date:** [24 April 2015 08:15 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/4 "2015-04-24T08:15:38Z")
Hi, I guess ​ **​** **sub-in-ftpttang** may be what you are looking for. ​ Have a look and let me know if this ​ ---
**Author:** ![Antonio\_Garcia-Uceda](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Antonio\_Garcia-Uceda](https://pyfr.discourse.group/u/Antonio_Garcia-Uceda)\ **Post date:** [24 April 2015 08:22 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/5 "2015-04-24T08:22:22Z")
Dear Arvind, Indeed this is what I need, thanks. Do you know if these are also available in PyFR -0.2.4? Unfortunately I’m having troubles to install the libraries for python-0.3.0 and thus for the moment I keep using the previous version. Just one last thing: Would you have in hand the set-up in PyFR for the laminar test case: Flow over Flat Plate? Thanks once more. Best regards, Antonio ---
**Author:** ![Antonio\_Garcia-Uceda](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Antonio\_Garcia-Uceda](https://pyfr.discourse.group/u/Antonio_Garcia-Uceda)\ **Post date:** [24 April 2015 08:27 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/6 "2015-04-24T08:27:46Z")
Sorry when I said set-up I meant the .ini file, 🙂 ---
**Author:** ![arvind\_iyer](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@arvind\_iyer](https://pyfr.discourse.group/u/arvind_iyer)\ **Post date:** [24 April 2015 08:30 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/7 "2015-04-24T08:30:42Z")
Well, I do not have any ready to use ini. I would recommend trying it and posting the ini file on the mailing list if you are not able to run it successfully (or even otherwise!) Regards Arvind ---
**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\ **Post date:** [24 April 2015 08:49 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/8 "2015-04-24T08:49:18Z")
"Do you know if these are also available in PyFR -0.2.4? " Yes, it is. Peter ---
**Author:** ![Antonio\_Garcia-Uceda](https://avatars.discourse-cdn.com/v4/letter/a/ce73a5/32.png) [@Antonio\_Garcia-Uceda](https://pyfr.discourse.group/u/Antonio_Garcia-Uceda)\ **Post date:** [24 April 2015 12:18 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/9 "2015-04-24T12:18:39Z")
I will try and I’ll upload the .ini file. unfortunately, you said the Slip BCs are only available on PyFR\_0.3.0, right? If so I need some time to get it installed. I’ll get back to you as soon as I can. Thanks a lot for your help. Best regards, Antonio ---
**Author:** ![arvind\_iyer](https://avatars.discourse-cdn.com/v4/letter/a/a6a055/32.png) [@arvind\_iyer](https://pyfr.discourse.group/u/arvind_iyer)\ **Post date:** [24 April 2015 12:20 UTC](https://pyfr.discourse.group/t/how-to-set-slip-bcs-on-pyfr/64/10 "2015-04-24T12:20:27Z")
> unfortunately, you said the Slip BCs are only available on PyFR\_0.3.0, right? Yes