President Ramnath Kovind will be on a three day visit to Tamilnadu. Security has been tightened at the airport and the surrounding areas on account of the visit. The President will be arriving at Chennai this evening and will stay at RajBhavan. Tomorrow he will depart to Vellore by helicopter to attend the 16th Annual Convocation at Thiruvalluvar University.Later the President will visit the Sri Mahalakshmi Golden Temple at Sripuram. On Thursday he will attend the 41st Annual Convocation at Anna University Guindy. President will leave for Delhi on the same day.