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Prabhu Lal Bhatnagar (8 August 1912 – 5 October1976), commonly addressed as P. L. Bhatnagar, was an...

Prabhu Lal Bhatnagar (8 August 1912 – 5 October1976), commonly addressed as P. L. Bhatnagar, was an Indian mathematician known for his contribution to the Bhatnagar-Gross-Krook (BGK) collision model used in Lattice Boltzmann methods (LBM). P. L. Bhatnagar was born in Kota in Rajasthan and was the second of five sons. He did his schooling in Rampura and later at Herberter College in Kota. After schooling he went to Maharajah's College in Jaipur where in 1935 he completed BSc with first rank, followed by MSc. He was married to Anand Kumari and had four sons Rakesh, Brijendra, Vinay and Kamal, and a daughter Kalpana. His research career started at the Allahabad University, where he worked from 1937 till 1939 on Fourier series and Allied series. The result of his work are included in the book of Erich Kamke. and also resulted in journal publications together with his supervisor Amiya Charan Banerjee. He became interested in the area of astrophysics after coming in contact with Megh Nad Saha, who was well known figure in the field. In 1939 he obtained DPhil degree in mathematics for his thesis titled On the Origin of the Solar System. In 1939 he joined St. Stephen's College, Delhi on