******************* 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, I want to load data of velocity components(u,v,w) from a file(*.fld) or expression into a user-defined array just like that in boundary conditions: <D VAR="u" USERDEFINEDTYPE="TimeDependent" VALUE="sin(PI*(x-t))" /> <REGION REF="1"> <D VAR="u" USERDEFINEDTYPE="TimeDependent" VALUE="sin(PI*(x-t))" FILE="bcsfromfiles_u_1.bc" /> </REGION> I wonder how it works. My purpose is to load the data into some arrays defined by myself like U[i], V[i], W[i] with the mesh data. Then I can use the data on each mesh point for further computation. Could you please tell me how to realize it with codes in Nektar++? I have check the codes in Explist.cpp, SessionReader.cpp, Conditions.cpp and IncNavierStokes.cpp but still have no idea. Many thanks, Zhaoyu Wang Shanghai Jiao Tong University