Multiscale Mechanical Modeling and Research Network (MMMRN) is a research group formed some enthusiastic students of Department of Mechanical Engineering, Bangladesh University of Engineering and Technology (BUET) under supervision of Dr. Md. Mostafizur Rahman (formerly in Department of Mathematics, BUET) in 2012. The group has been working with many professors from BUET, University of Malaya, University Brunei Darussalam and Grad Student of Pennsylvania State University, Case Western Reserve University on different fields of Mechanical Engineering. At present, seven research assistants are working in the group. From the beginning, the group has published quality articles in many international conferences and journals on renewable energy and heat transfer.