Milivoje Kostic (also, Milivoje M. Kostic; in Serbian Cyrillic: Миливоје Костић; born 20 March 1952 in Bioska, Užice municipality, Serbia), is a Serbian-American thermodynamicist and professor emeritus of mechanical engineering at Northern Illinois University, Licensed Professional Engineer (PE) in Illinois, and Editor-in-Chief of the Thermodynamics section of the journal Entropy. He is an expert in energy fundamentals and applications, including nanotechnology, with emphasis on efficiency, efficient energy use and energy conservation, and environment and sustainability.
Milivoje Kostic was born and raised in Serbia (ex-Yugoslavia at the time). He completed his "Dipl-Ing" (Diploma Engineer) degree in Mechanical Engineering at the University of Belgrade in 1975, with the distinction of having the highest GPA in the mechanical engineering program history at the time. Then he worked as a researcher in thermal engineering and combustion at Vinca Institute for Nuclear Sciences, which then hosted the headquarters of the International Center for Heat and Mass Transfer (ICHMT), and later taught at the University of Belgrade. In meantime, he spent three summers as an exchange visitor in England, West Germany, and the former Soviet Union. Kostic came to the University of Illinois at Chicago in 1981 as a Fulbright grantee, where he received his Ph.D. in mechanical engineering in 1984. He subsequently worked several years in industry before emigrated to the United States in 1986. After working for 26 years at Northern Illinois University, he retired in 2014 to focus on his fundamental research, and became Professor Emeritus in 2015.
Kostic was appointed the Editor-in-Chief of the Thermodynamics Section of Entropy journal, after serving as a Guest Editor of two special issues on Entropy and the Second Law of Thermodynamics.
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Kostic has also worked in industry and has authored a number of patents and professional publications, including invited articles in professional encyclopedias.
Professor Kostic was appointed as NASA faculty fellow, and Fermi and Argonne National Laboratories faculty researcher. He has a number of professional awards and recognitions, is a frequent keynote plenary speaker at international conferences and at different educational and public institutions, as well as member of several professional societies and scientific advisory boards. Entransy concept and controversies
Kostic is interested in the fundamental laws of nature, thermodynamics and heat transfer fundamentals and applications, and especially the Second law of thermodynamics and entropy. , see also arXiv e-prints. He has developed a collaboration with Tsinghua and other Chinese universities. Kostic wrote about Entransy concept and controversies  , and is editing an Entropy special Issue, Nature of heat and entropy, as well as a Topical collection, Foundations and Ubiquity of Classical Thermodynamics.
More recently Kostic has raised some critical issues regarding the challenges of the Second Law of thermodynamics, including a number of puzzling issues still surrounding thermodynamics and the nature of heat, epitomized by the elusive Maxwell's demon. Namely, he argued that Maxwell and his followers focused on 'effortless gating' a molecule at a time, but overlooked simultaneous interference of other chaotic molecules, while the demon exorcists tried to justify impossible processes with misplaced 'compensations' by work of measurements and gate operation, and information storage and memory erasure with entropy generation.. Some other unjustified claims, fundamentally misplaced and dramatized, like “heat flowing from cold to hot without external intervention,” have been critically analyzed and demystified by Kostic .
- Faculty and Staff (Milivoje Kostic), College of Engineering and Engineering Technology at Northern Illinois University, 
- Faculty of Mechanical Engineering, University of Belgrade
- Thermodynamics Section Editorial Board, Entropy journal
- Thermodynamics Section, Entropy journal
- Entropy Special Issue (2013): Entropy and the Second Law of Thermodynamics, 
- Entropy Special Issue (2016): Exploring the Second Law of Thermodynamics, 
- Kostic, M.M. "Entropy Generation Results of Convenience But without Purposeful Analysis and Due Comprehension—Editorial," Entropy 2016, 18(1), 28; doi:10.3390/e18010028
- Kostic, M., "The Elusive Nature of Entropy and Its Physical Meaning," Entropy 2014, 16(2), 953-967; doi:10.3390/e16020953
- Kostic, M., "Critical Issues in Nanofluids Research and Application Potentials," Chapter in Nanofluids: Research, Developments and Applications, (Editor Y. Zhang), Nova Science Publisher, Inc., 2013.
- Secco, R.A., Kostic, M., and J. R. deBruyn, "Fluid Viscosity Measurement," In The Measurement, Instrumentation and Sensors Handbook, 2nd Edition (J.G. Webster, Editor-in-Chief), CRC Press 2012, Boca Raton, 2013.
- Kostic, M., "Energy: Physics," Chapter in Encyclopedia of Environmental Management (Editor S.E. Jorgensen), Vol. II. (Print Version ISBN 978-1-4398-2927-1), p. 808-823, doi:10.1081/E-EEM-120046144
- Kostic, M., "Revisiting The Second Law of Energy Degradation and Entropy Generation: From Sadi Carnot's Ingenious Reasoning to Holistic Generalization," AIP Conf. Proc. 1411, 327-350 (2011); doi:10.1063/1.3665247.  Abstract
- Kostic, M., M. Golubovic, J.R. Hull and S.U.S. Choi, "One-step Method for the Production of Nanofluids," DOE-ANL invention S-105,821. U.S. Patent Number: US 7,718,033 B1, 2010.PDF
- Kostic, M., "Energy: Global and Historical Background," In Encyclopedia of Energy Engineering (B. L. Capehart, Editor), Taylor & Francis/Marcel Dekker, 2007.
- Kostic, M., "Physics of Energy," In Encyclopedia of Energy Engineering (B. L. Capehart, Editor), Taylor & Francis/Marcel Dekker, 2007.
- Kostic, M., "Work, Power, and Energy," In Encyclopedia of Energy (C.J. Cleveland, Editor-in-Chief), Volume 6, pp. 527-538, ISBN 0-12-176480-X, Elsevier, 2004.
- J.P. Hartnett and M. Kostic, "Heat Transfer to Newtonian and Non-Newtonian Fluids in Rectangular Ducts," In Advances in Heat Transfer, Vol. 19, p.247-356, Academic Press, 1989.
- M. Kostic Curriculum Vita, Northern Illinois University, PDF
- "Fundamental Laws of Nature - Professor Kostic". sites.google.com. Retrieved 2017-10-17.
- Engineering's Kostic helps expand NIU to China, NIUToday, 5 Nov. 2013
- Entransy concept and controversies, International Journal of Heat and Mass Transfer 115 (2017) 340–346 
- Milivoje M. Kostic (2020). "Maxwell's Demon and its Fallacies Demystified". arXiv:2001.10083. Cite journal requires
- Milivoje M. Kostic (2020). "'Heat Flowing from Cold to Hot without External Intervention' Demystified: Thermal-Transformer and Temperature Oscillator". arXiv:2001.05991. Cite journal requires
- Professor Kostic's Website at Northern Illinois University.
- Kostic's profile in Hmolpedia, an Encyclopedia of Human Thermodynamics.
- Professor Kostic's Google Site.
- RTS-Radio Televizija Srbija -Professor Milivoje Kostic
- TV-LAV Dnevnik - Professor Milivoje Kostic.
- TV-LAV Razglednica iz Amerike - TV Interview with Professor Milivoje Kostic
- An Assay in "Prodavci Znanja (Knowledge Dealers)" book by Srecko Stopic (in Serbian, ISBN 978-86-911639-1-4, 2009)
- Could Knowledge be Excessive: Computers will have larger influence in the future than the mass production to date (in a Serbian newspaper, 1986)
- "No progress without creativity" & "The best is fired" (in Serbian newspapers, 1985 & 1988)