I want to know that under which university this institute affilated?

Not affiliated to university we guess. Please check on thi if some one told you. It does not seem they are affiliated

Arena Animation is affiliated to MSU(Manonmaniam Sundaranar University), a UGC approved, NAAC accredited, State Govt University of Tamilnadu. Select Arena Centres are associated as Onsite Academic Campus of University. Visit-http://www.msuniv.ac.in/aptech.aspx for queries on University.. For queries