The centre to centre distance between two consecutive baffles in a shell and tube heat exchanger is called the baffle pitch or baffle spacing, which is more than 1/5th the I.D. of the shell. Which of the following is not a function of the baffles?

• A. o increase the residence time of shell side fluid
• B. o provide support to the tube bundle
• C. o reduce the induced vibration in the tubes
• D. o increase the tube side heat transfer co-efficient by inducing turbulence