Yurii Ananiy~vi~~~ik~ai~ov on his 60th birthday

PROFESSORYu. A. Mikhailov, U.S.S.R. Honorary
Editorial Advisory Board member of the International
Journal of Heat and Mass Transfer, Full Member ofthe Latvian Academy of Sciences, Honoured Workerof Science and Technology of the Latvian SSR, distinguish~ Soviet scientist in the areas of thermal
physics, theoretical thermal engineering and magnetichydrodynamics, author of well-known books andmonographs on the theory of interrelated heat andmass transfer in electrically conducting, polarizable,
heterogeneous and other media in electromagnetic
fields, celebrated his 60th birthday in 1987. His interests are wide ranging and include the following :creation of the physical and technical foundations
for the method of using raw peat for direct power
production ;development of theoretical principles and experimental techniques of high-rate drying by means ofsuperheated steam and pressure release ;development of the general theory of heat and masstransfer in dispersed media ;study of the problems of liquid-liquid extraction;
investigation of heat and energy transfer in the pres-ence of phase and chemical conversions in multiphaseflows of a low-temperature plasma ;investigation of heat and mass transfer in a magnetic field (in two-phase and multicomponent electrically conducting systems, magnetically polarizable
media and magnetic liquids included);development of the non-linear analytical theory ofinterrelated phenomena of transfer.
Yu. A. Mikhailov was born in Moscow and received
his higher education in Riga. While a student at thePhysico-Mathemati~lDepartment of the Latvian
State University, he showed a great aptitude towards
scientific investigations. It is during this period that
his work SpeciJic Features of the Passage of Particles
through a Potential Barrier in the Case of Pseudoscalar Interaction was written. In 1951 the working

activity of a young physicist-theorist began at theInstitute of Energetics and Electrical Engineering of
the Latvian Academy of Sciences (now the Physicaland Power Engineering Institute), where theoreticaland experimental investigations were carried out into
drying and physico-engineering justification of a fundamentally new method of using raw peat for direct

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U.S.S.R. EDITORIAL BOARD MEMBERSpower production. The method consisted essentiallyof the use of steam. produced by moisture vaporization from peat and process sustainment by theheat of burning of the dehydrated peat. He took partin the design and then in the construction and testingof a pilot plant. The work on the physical aspects ofthis problem led Yu. A. Mikhailov to the necessity ofundertaking a more thorough study of the processesof interrelated heat and mass transfer.
From 1953 to 1956 Yu. A. Mikhailov was a postgraduate student, and in 1957 he defended hiscandidate thesis on the subject of “Analytical Investigations of Heat and Mass Transfer in Convective
Drying”. During his work on the thesis, he met A. V.
Luikov, a Full Member of the Byelorussian Academyof Sciences. The acquaintance developed into a longstanding creative friendship which became the sourceof many great scientific initiatives and achievements.
Based on the methods of irreversible thermodynamics,
generalization was made of a wide range of investigations into the processes of interrelated heat andmass transfer, the general phenomenological theory
was developed for molar-molecular energy and substance transfer in dispersed media, capillary-porous
bodies, multi~omponent heterogeneous systems, solutions, and gaseous mixtures. In contrast to other analogous investigations of that time, the use of themethods of irreversible thermodynamics was not confined exclusively to the derivation of mathematicalexpressions for fluxes and corresponding thermodynamic forces. A logically closed analytical theoryof interrelatedtransfer processes was created :from the substantiation of the initial system of equations to the analysis of the process and the resulting
effects under different conditions of heat and masstransfer interaction with the surrounding medium.
For this purpose, it was necessary to refine the techniques of the analysis. Thus, for the first time it became
possible to logically consistently show, on the examples of specific media, the force of the method andto bring the analysis to final relations and practicalconclusions. Because of this, one of the origi~tors ofirreversible thermodynamics, Prof. S. R. de Grootstated at the 1st All-Union Heat and Mass Transfer
Conference in 1961 that the analytical theory of irreversible thermodynamics
and its practical applications had been first developed in the Soviet Ilnion
and detailed in the book by A. V. Luikov and Yu. A.
Mikhailov. The results of investigations were generalized in his monographs written together with A. V.
Luikov : Theory qf Energy and Substance Tra@er(Minsk, 1959) and Theory of Heat and Mass Trarzsfer (MOSCOW,1963). Soon these books became world
renowned and were translated and published in theU.S.A., U.K., China, and Israel. Concurrently with
this, Yu. A. Mikhailov continued and supervised theworks which were begun earlier. In 1964 he defended
his doctoral thesis on “The Kinetics and Dynamics ofHighly Intensive Methods of Drying”. The complexity of the problems studied were culminated by

the publi~tion of his monograph Dry&g by a Skperheated Steam (Moscow, 1967) where he generalized
investigations into drying by a pressurized superheated steam and depressurizdtion drying, providing
the background for the method of direct use of moist
peat for power production.
New ideas formed a basis for many modern Soviet
physico-technolo~cal
investigations in the field ofdrying technology and thermai treatment of materials.
The works on the theory of heat and mass transfer
also made a certain impact on the developmentof theoretical investigations in Czechoslovakia, Hungary, Poland, Romania and also in Japan and India.
The creation of the analytical theory of heat and masstransfer gave the stimulus for the development of anumber of new trends: the search for new integral
transfo~ations,for the methods of solving inverse
heat and mass transfer problems, approximate
methods for solving the systems of transport equations, methods for modelling heat and mass transfer
phenomena, and methods for solving non-linearproblems.
In subsequent years Yu. A. Mikhailov extended thegeneral theory of heat and mass transfer to a numberof new processes, in particular chemical engineering,and developed the problems of non-linear analyticaltheory of heat and mass transfer. Together withN. V. Korolkov he published the book Mass Trtmsfkr
ProcessesofChemical Engineering.

I,iquid Sorhtiorl(Riga, 1976) and with Yu. T. Glarunov the book
Variational Methods in the Theor!, of Nonlincur Heatand Mass Transfer (Riga, 1985).
Beginning in 1961, Yu. A. Mikhailov carried out
concurrent investigations into the phenomena oitransport and of heat/mass transfer in the presenceof magnetic and electric fields. These investigations
connected his works with the current problems ofmagnetic hydrodynamics. Attention was paid not
only to condensed electrically conducting media, butalso to multicomponent
and multiphase systems:
emulsions, suspensions, magnetic liquids, and ionizedgases. As a result of complex investigations made by
Yu. A. Mikhailov and his colleagues. there originated
new trends of magnetic hydrodynamics:
thermalphysics of conducting
and magnetizable
media(including magnetic fluids), thermal physics of hightemperature multiphase media in the presence ofphase and chemical conversions. A part of these investigations is represented in monographs written byYu. A. Mikhailov together with his pupils : Hear anti
TraFl~~er in an Electri~~~~ag~~etic Field fRig;r,1967), Heat and Mass Tran&r in a Magnetic Fil+d(Riga, 1980) or edited by him : Transport of‘ Heatand Charge on the Surface of Metal in Chemicoll~
Active Flows (Riga, 1980).
~~1s~~

Yu. A. Mikhailov is an active organizer of scicncc.
He was advisor for 19 completed Candidate and Doctoral theses. From 1967 Yu. A. Mikhailov became
Director of the Institute of Physics of the Latvian
Academy of Sciences and in 1968 was elected a Full

Yurii Ananiyevich

Mikhailov

Member of the Latvian Academy of Sciences. From1970 to 1983 he was Academician-Secretaryof theDepartment of Physical and Technical Sciences of
the Latvian Academy of Sciences. From 1970 Yu. A.
Mikhailov has been a member of the Presidium of
this academy. He is also head of the Departmentof Thermal Physics and head of a laboratory at theInstitute of Physics. From 1968 Yu. A. Mikhailov hasbeen the Editor-in-Chief of the All-Union Journal
Magnetic Hydrodynamics which is translated and published in the U.S.A., and also has been a memberof a number of Soviet scientific publications, and amember of a number of All-Union ad hoc and scientific councils.
For the series of works on the theoretical foundations of heat and mass transfer in dispersed media

on his 60th birthday

1547

Yu. A. Mikhailov was awarded, in 1976, the State
Prize of the Latvian SSR and in 1971 was awarded
the Fridrich Tsander Prize of the Latvian Academyof Sciences for the development of the theory of heatand mass transfer in MHD processes.
The public activities of Yu. A. Mikhailov are veryextensive. For many years he was on the Soviet andRepublican Committees of Peace Supporters. He
often writes for papers and journals on the history andphilosophy of science, its moral, ethical and public
aspects. Yu. A. Mikhailov is full of creative ideas andorganizing abilities. We wish him all the best andfurther successes in his work.

U.S.S.R. EDITORIALBOARD MEMBERS