Thank you for the book. i took a look at it and this might help me.
But it was not the book required because "Amir Faghri: Heat Pipe Science and Technology" includes a chapter about two phased close thermosyphon that i will need to study in my project.
This is an exceptionally scarce book; when it rarely appears for sale, the asking price is often more than $2,000. Copies are even hard to find in major research libraries. Perhaps you should consider alternative sources. There have been MANY advances in the science of heat pipes since Fagri's seminal work in the early 1990s (over two decades ago). Take a look through some of the recent papers indexed on Google Scholar ... here is just one good example published by Faghri himself in 2008 updating his earlier rudimentary work: