Hi Andrei, I am cc’ing Yu Pan and Zhen-Guo. I presume you are using the implicit code if you are discussing preconditioners. I do not think we have any specific implementation for low Mach number however. Cheers, Spencer. On 10 Feb 2021, at 13:59, Cimpoeru, Ionut Andrei <IonutAndrei.Cimpoeru@Rolls-Royce.com<mailto:IonutAndrei.Cimpoeru@Rolls-Royce.com>> wrote: This email from IonutAndrei.Cimpoeru@Rolls-Royce.com<mailto:IonutAndrei.Cimpoeru@Rolls-Royce.com> originates from outside Imperial. Do not click on links and attachments unless you recognise the sender. If you trust the sender, add them to your safe senders list<https://spam.ic.ac.uk/SpamConsole/Senders.aspx> to disable email stamping for this address. Hi, Is there a low mach preconditioner implemented for the compressible code? Thanks a lot guys. Cheers, Andrei Not Subject to Export Control This information is provided by Rolls-Royce in good faith based upon the latest information available to it; no warranty or representation is given; no contractual or other binding commitment is implied. © 2021 Rolls-Royce The data contained in, or attached to, this e-mail, may contain confidential information. If you have received it in error you should notify the sender immediately by reply e-mail, delete the message from your system and contact +44 (0) 3301235850 (Security Operations Centre) if you need assistance. Please do not copy it for any purpose, or disclose its contents to any other person. An e-mail response to this address may be subject to interception or monitoring for operational reasons or for lawful business practices. (c) 2021 Rolls-Royce plc Registered office: Kings Place, 3rd Floor 90 York Way, London, N1 9FX Company number: 1003142. Registered in England _______________________________________________ Nektar-users mailing list Nektar-users@imperial.ac.uk<mailto:Nektar-users@imperial.ac.uk> https://mailman.ic.ac.uk/mailman/listinfo/nektar-users