The program generated new physical models for turbulence, interfacial reactions, bubble size distribution, packing, and chemical reactions. AEA participated in ADMIRE's effort to adapt and validate CFD codes for gas-liquid reactors in the bubbly flow regime.
MUSIG was originally developed under the auspices of the European Commission-funded Advanced Design Methods for Improved Performance of Industrial Gas-Liquid Reactors (ADMIRE) project. The MUSIG model provides an accurate prediction of interfacial area, which is critical in such unit operations as gas lift reactors and contact tanks.ĬFX-4's MUSIG multiphase model predicts void fraction for different gas loadings for flow in a gas-lift reactor. The new multiple size group (MUSIG) multiphase model simulates multiphase flows as it handles the behavior of multi-sized bubbles, including break-up and coalescence phenomena. The new release of CFX-4 features two new physical models, MUSIG and PFDReaction, tools that enhance understanding of reactions in dispersions. It also introduced CFX-ProMixus, an entry-level CFD program to optimize mixing vessel processes.
The company has upgraded its CFX-4 CFD software to improve handling of bubbles and voids and process chemistry. The latest stride forward comes from AEA Technology Engineering Software, a CFD leader and business unit of (Didcot, UK). The programs, which calculate fluid flow and heat transfer, have become much easier to use, and visualization tools have made the results simpler to interpret. #0 Foam::error::printStack(Foam::Ostream&) at ?:? #1 Foam::error::abort() at ?:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy>::calculate() at ?:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy>::correct() at ?:? #4 ? at ?:? #5 _libc_start_main in "/lib/x86_64-linux-gnu/libc.so.AEA Technology Engineering Software Inc.past five years, computational fluid dynamics (CFD) has fought for its place as an essential tool for chemical process engineers. > FOAM FATAL ERROR: Maximum number of iterations exceededįrom function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. I have some problem with chtMultiRegionSimpleFoam So, a parametric study with this parameter might be suggested. Too small timescales take long time for a steady-state solution to converge or the solution might not converge in strict sense at all, because from one pseudo-timestep to the next some small scale turbulent changes to the flow are getting resolved in time, so that the residuals do not drop to very small values. Very large timescales might lead to numerical instability and divergence. Here you can set whatever timescale you desire for the pseudotransient solution method. There you can swith the "Fluid Timescale Control" to "Physical Timescale". In CFX this is done in the solver control panel. Here the timescale of the pseudo-transient solution method can easily be changed from automatic timescale selection (where CFX and/or Fluent decide by some heuristics about what might be an appropriate timescale for the method) to a user specified timescale. ANSYS CFX as well as ANSYS Fluent are using pseudo-transient solution approach for steady-state computations.