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Eulag
Research Model
for Geophysical Flows
 

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Past Events

What is New in Eulag?

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EULAG is a numerical solver for all-scale geophysical flows. The underlying anelastic equations are either solved in an EULerian (flux form), or a LAGrangian (advective form) framework.

EULAG model is an ideal tool to perform numerical experiments in a virtual laboratory with time-dependent adaptive meshes and within complex, and even time-dependent model geometries. These abilities are due to the unique model design that combines the nonoscillatory forward-in-time (NFT) numerical algorithms and a robust elliptic solver with generalized coordinates. The code is written as a research tool with numerous options controlling the numerical accuracy and to allow for a wide range of numerical sensitivity tests. These capabilities give the researcher confidence in the numerical solutions of his/her problem. The formulation of the model equations allow for various derivatives of the code including codes for stellar atmospheres, ocean currents, sand dune propagation or biomechanical flows. EULAG is a fully parallelized code and is easily portable between different platforms.

All the model developments and details of the numerical algorithms are documented in a number of peer reviewed papers by Piotr Smolarkiewicz and his colleagues. The EULAG modeling system is developed and supported by the Cloud Systems Group in the Mesoscale and Microscale Meteorology Division, NCAR.

Example: QBO analogue simulation

Current announcements:

4th International EULAG Workshop on Forward-in-time Differencing for Earth-System Models, 20-24 October 2014 in Mainz, Germany
(see also first announcement in PDF)

Past events:

3rd International EULAG Workshop held 25th -28th June 2012 in Loughborough UK.

2nd EULAG Model Users' Workshop took place in Sopot, Poland, 13-16 September 2010.

1st EULAG Model Users' Workshop was held in Bad Tölz, Germany 6-10 October 2008. The workshop offered tutorials covering essential physical, mathematical and numerical aspects of EULAG and provided a forum to exchange information and ideas among EULAG users.

Special issues:

The special issue of the Acta Geophysica: Special volume 59 (6), 2011: Modeling Atmospheric Circulations with Sound-Proof Equations The papers collected in the present volume of Acta Geophysica address the capability of sound-proof equations to model all-scale atmospheric circulations. Technical topics covered in this special issue range from theoretical numerical analysis, model design, and massively-parallel programming to simulation of cloud processes, regional weather and global atmospheric circulations.

The special issue of the International Journal for Numerical Methods in Fluids: Volume 50, Issue 10 (10 April 2006) is devoted to recent developments and applications of high resolution methods based on MPDATA - Multidimensional Positive Definite Advection Transport Algorithm (issue edited by Joanna Szmelter). The papers published in this issue include the material presented during the XIII Conference on Finite Elements for Flow Problems at Swansea UK (4-6 April 2005).

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