[Nektar-users] Time-average of a gradient

******************* 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. ******************* Dear All, How may I calculate the time-average of a gradient, for example velocity gradient? Kind regards syavash