.lapan. Kenya. Net herlsnds. Norway. Sweden. UK. LISA. USSR, and
Yugoslavia). Among the invited participant.. were several younger scientists
selected by the Scientific Committee. Sixty-two formal papers were presented; of these, 54 were shorter papers and 8 were invited papers.
Extensive discussion followed most of the papers and appreciable time for
informal discussion was arranged during the Symposium.
The studies of turbulent diffusion and more particularly the use of the
statistical theory of turbulence in these studies originates, to a major extent,
with the work on diffusion by continuous movement by G. I. Taylor published
in 1921. This study has been an important source of inspiration for both
theoretical and experimental research in fluid dynamics and atmospheric
physics. An introductory paper presented by J. Kampk de Feriet at the
Symposium was devoted to the discussion of some of the contributions to
thc study of turbulent diffusion and of atmospheric turbulence during the
first 25 years after the work originating with Taylor. While turbulent
diffusion involves the use of the Lagrangian approach, most of the experimental measurements of turbulence 'as well as the studies of the statistical
theory of turbulence are based on the Eulerian approach. The relation
between the Eulerian and Lagrangian approaches is thus of particular
importance in such studies and still remains an object of challenge to both
theoretical and experimental investigations, as indicated in a paper by
S. Corrsin surveying the second 25 years. Some recent contributions arc
based on experiments involving the modeling of turbulent phenomena
using high-speed computer methods. These studies lead to some relations
between the Eulerian and Lagrangian characteristics of turbulence for the
computer models which result in better insight into the nature of the
laws governing turbulent diffusion. This aspect of modeling of turbulence
phenomena was discussed in several papers.
While some or the basic knowledge has been developing, the many more
praclical problems of atmospheric and oceanic pollution require solutions.
Scvcral papers on turbulence in the planetary boundary layer, on shear flow
phcnoinena. and on numerical and wind-tunnel simulation of such flows
WL'I'C presented. The interaction between the viewpoints of geophysicists and
lluid dynamicists in these discussions has been of particular interest and
Jcserves t o bc continuously encouraged. The experimental studies of geophysicists involve considerably larger scak phenomena than most of the
studies of fluid dynamicists. Although fluid dynamic studies may involve
very precise mcasuring methods (such as hot-wire anemornetry). some of
the more complex fluid dynamic phenomena may often be lost in such
studies. The use of high-speed computer methods to analyze experimental
measurements of turbulent phenomena now make it possible to resolve some
of the hot-wire measurements and to observe what could well be referred
Yugoslavia). Among the invited participant.. were several younger scientists
selected by the Scientific Committee. Sixty-two formal papers were presented; of these, 54 were shorter papers and 8 were invited papers.
Extensive discussion followed most of the papers and appreciable time for
informal discussion was arranged during the Symposium.
The studies of turbulent diffusion and more particularly the use of the
statistical theory of turbulence in these studies originates, to a major extent,
with the work on diffusion by continuous movement by G. I. Taylor published
in 1921. This study has been an important source of inspiration for both
theoretical and experimental research in fluid dynamics and atmospheric
physics. An introductory paper presented by J. Kampk de Feriet at the
Symposium was devoted to the discussion of some of the contributions to
thc study of turbulent diffusion and of atmospheric turbulence during the
first 25 years after the work originating with Taylor. While turbulent
diffusion involves the use of the Lagrangian approach, most of the experimental measurements of turbulence 'as well as the studies of the statistical
theory of turbulence are based on the Eulerian approach. The relation
between the Eulerian and Lagrangian approaches is thus of particular
importance in such studies and still remains an object of challenge to both
theoretical and experimental investigations, as indicated in a paper by
S. Corrsin surveying the second 25 years. Some recent contributions arc
based on experiments involving the modeling of turbulent phenomena
using high-speed computer methods. These studies lead to some relations
between the Eulerian and Lagrangian characteristics of turbulence for the
computer models which result in better insight into the nature of the
laws governing turbulent diffusion. This aspect of modeling of turbulence
phenomena was discussed in several papers.
While some or the basic knowledge has been developing, the many more
praclical problems of atmospheric and oceanic pollution require solutions.
Scvcral papers on turbulence in the planetary boundary layer, on shear flow
phcnoinena. and on numerical and wind-tunnel simulation of such flows
WL'I'C presented. The interaction between the viewpoints of geophysicists and
lluid dynamicists in these discussions has been of particular interest and
Jcserves t o bc continuously encouraged. The experimental studies of geophysicists involve considerably larger scak phenomena than most of the
studies of fluid dynamicists. Although fluid dynamic studies may involve
very precise mcasuring methods (such as hot-wire anemornetry). some of
the more complex fluid dynamic phenomena may often be lost in such
studies. The use of high-speed computer methods to analyze experimental
measurements of turbulent phenomena now make it possible to resolve some
of the hot-wire measurements and to observe what could well be referred