Round Tables and Discussions

1
Round Tables and Discussions

• Experiment Theory
• Numerical Simulations
• How to stay connected to reality?

2
Experiments - I

• 1. What do we observe and measure?
• 2. How good are our observations and diagnostics?
• 3. How to estimate the information capacity of
  data sets?
• 4. What are the borders (numbers) for dynamic
  range, parameter range, spatio-temporal
  resolution and accuracy, precision, control, data
  rate acquisition?
• 5. Which values should be monitored (sensitive
  and robust diagnostic parameters)?
• 6. Records (parameter range) versus
  Diagnostics (quality and numbers)

3
Experiments - II

• 7. How to establish the connection to
  high-technologies and how to apply the new
  diagnostic opportunities? It may be not enough to
  buy the instrumentation expertise
• 8. How to verify and validate theoretical and
  numerical models and to develop the concept of
  model experiments?
• 9. How to distinguish between various effects
  observed in our complex (multi-scale and
  multi-physics) experiments?
• 10. How to separate the contribution of unsteady
  turbulent processes?

4
Theory - I

• 1. Development of new theoretical concepts
  applicable for non-local, multi-scale, unsteady
  and transient processes (theoretical physics,
  functional analysis, stochastic analysis)
• 2. Focus on a connection to experiments and
  simulations, identify reliable diagnostic
  parameters, consider asymptotic versus
  finite-time
• 3. Future challenges categorize and
  differentiate among various turbulent flows,
  consider hard problems (from micro- to
  astro-scales) in a broad variety of topics

5
Theory - II

• 4. Classical problems RTI, KHI, RMI, MRI,
  all other I-s, vortex dynamics, intermittency,
  shock-driven dynamics
• 5. Theory means not only ideas, it also means
  responsibility models with numerous adjustable
  parameters have limited predictive capability
• 6. Outline directions for future research, focus
  on understanding and be consistent

6
Numerical simulations - I

• 1. CFD lt-gt DNS lt-gt LES lt-gt RANS lt-gt MD
• 2. Wall-bounded flows versus Periodic Boundary
  conditions
• 3. Ill-posed problems, accurate accounting for
  the initial conditions
• 4. Fluctuations in hydrodynamics molecular
  dynamics versus continuous fluid dynamics,
  applicability of the Navier-Stokes equations
• 5. Miscible/immicisble/diffusion/front-tracking/sh
  ock-driven/turbulent flows good schemes versus
  affordable computations
• 6. Computational limits can the simulations
  substitute the theory and the experiments?

7
Numerical simulations - II

• 7. Connection to experiments spatial properties
  of flow quantities at a finite time versus
  temporal diagnostics in few points
• 8. Comparison and connection to the experiments
  and theories requirements for the data sets and
  computational set-up
• 9. RTI/RMI connection to other problems better
  quantification, including fluxes of energy,
  momentum, mass, enstrophy, spatial and temporal
  distributions
• 10. Rotating fluids, convection and
  magneto-convection, astrophysical problems,
  plasmas, condensed matter

8
Data analysis

• 1. Estimates of information capacity of data sets
• 2. Availability of data to a wide community
  (e-fluids, ERCOFTAC)
• 3. Data storage and transfer, data
  post-processing and data processing on a fly

9
Education

• 1. Organize tutorials/workshop/summer schools on
  state-of-the-art diagnostics
• 2. How to educate ourselves and others in the
  fast changing world?

10
Our future?

• What was good and not so good?
• What did you like and which aspects did you
  dislike?
• 2. When, where and in which format?