******************* This email 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 Everyone, One thing I am noticing with NEKTAR++ is that you specify the base flow function in the configuration/xml file. However, both LEE and APE equations require the estimation of the spatial gradients of the base flow. I was wondering what method of approximation is used within NEKTAR++ as the configuration files does not ask for an analytical expression of the spatial gradients. Thank you so much *YiLin Liu * *403-397-3457* *liuyilin.liu@gmail.com <liuyilin.liu@gmail.com>* MASc Student at CML <https://cml.mech.ubc.ca/> UBC