The 4th Symposium on Turbulence, Heat and Mass Transfer, organized by ICHMT, the International Centre for Heat and Mass Transfer, will again provide an opportunity for scientists and engineers to present recent advances and to discuss current problems, future needs and prospects in the area of heat and mass transfer associated with turbulence. This is the fourth triennial symposium, after Lisbon, Portugal (1994), Delft, The Netherlands (1997) and Nagoya, Japan (2000). Major topics and new trends will be introduced through several keynote lectures that will be presented by internationally recognized experts.