Hi I am student working on microchannel heat exchanger and have the following questions 1-how can I saving the temperature and velocity distribution along the interior of the channel as a data file to calculate the distribution of bulk temperature (Tm) along the channel length.And how can I calculating the Tm.

2-How can I calculating the distribution of Nusselt No. along the channel.

Please help me and sending the answer to my email with thanks

you might be able to use a Custom Field Function to plot contours of bulk temp and Nu along any surface that you want to create in the define surface panel.

Define->Custom Field Functions.... and Surface->Iso-Surface...

For exporting data you can do Plot->XY Plot and pick velocity, pressure, temp etc..then choose which surface (i.e. default interior/fluid domain) you want and choose "Write to file" which will creat a data file in your working directory