Numerical simulations in quantum chromodynamics

One of the most outstanding challenges in physics today is to explain quantitatively the observed properties of protons, neutrons etc. generically called hadrons. A significant part of this challenge is also to explain so called Quark Confinement. Though there is very strong evidence that the correct theoretical description is provided by the so called Quantum Chromodynamics (QCD), it is an extremely difficult theory to solve by traditional analytical techniques. Great strides have been made over the last couple of decades in numerical simulations of this theory which require the fastest available supercomputers. In this paper I shall briefly describe QCD and also describe its numerical simulations and their complexity. I shall briefly describe the most recent results obtained on the Teraflop Linux cluster KABRU at IMSc. (author)