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plb_wiki:release:log_v0.7_r0 [2011/12/18 16:57] (current)
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 +===== Changelog of Version 0.7, Release 0 =====
 +<WRAP center 30% round download>
 +Download this release:
 +[[http://www.palabos.org/images/palabos_releases/palabos-v0.7r0.tgz | tgz]]
 +[[http://www.palabos.org/images/palabos_releases/palabos-v0.7r0.zip | zip]]
 +</WRAP>
  
 +
 +Version 0.7 extends Palabos in many important ways.
 +
 +==== Python interface ====
 +
 +Palabos can now been scripted through a Python interface. This offers the same performance, and parallel scalability, as the C++ interface, but it is much simpler to use for end-user applications.
 +
 +==== Grid refinement ====
 +
 +Finally: grid refinement is implemented in Palabos. It works with existing physical models (data processors and dynamics classes) without the need for modifying them. And it is parallelized.
 +
 +For now, the 2D interface only is part of the release, and the 3D interface follows in a subsequent release.
 +
 +==== New multi-phase model ====
 +
 +Implementing the He/Lee model was a real crash-test for Palabos. The model requires couplings between many scalar-fields, vector-fields, and lattices, and uses next-to-nearest-neighbor interaction stencils. Test result positive: the model works fine, runs fast, and scales impressively. This adds a new multi-phase model to Palabos which handles large densit and viscosity ratios between the two phases.
 +
 +
 +==== New example programs in the directory examples/showcases ====
 +
 +=== collidingBubbles3d ===
 +Application of the new He/Lee multi-phase algorithm to a 3D appliation of two colliding bubbles.
 +
 +=== gridRefinemen2d ===
 +Application of Palabos' new 2D grid refinement abilities to the 2D lid-driven cavity. This application, like all others, is parallelized.
 +
 +=== womersley ===
 +2D time-dependent, force driven channel flow, with analytical Womersley solution.
 +
 +=== rectangularChannel3d ===
 +3D stationary flow in a channel with rectangular cross-section.
 +
 +
 +==== New data processors ====
 +=== setExternalScalar and setExternalVector ===
 +Use the data processors SetExternalScalarFunctionalXD or SetExternalVectorFunctionalXD, respectively their wrapper functions setExternalScalar and setExternalVector, to initialize external scalar- or vector-fields of a lattice. Example: an external force term may be initialized to a constant value through a command like
 +
 +<code c++>
 +setExternalVector(lattice, lattice.getBoundingBox(),
 +                  DESCRIPTOR<T>::ExternalField::forceBeginsAt, Array<T,2>(0.,-force));
 +</code>
 +
 +==== Bug fixes ====
 +=== Neumann boundary conditions and periodicity ===
 +The code used to crash or misbehave when some walls were periodic while others implemented a Neumann condition. This has been fixed.
 +
 +=== Wrong implementation of division operator on scalar fields ===
 +Scalar fields used to execute an addition when a division was requested. This has been fixed.
 
plb_wiki/release/log_v0.7_r0.txt · Last modified: 2011/12/18 16:57 (external edit)
 
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