CONVERGE 2.4.19 datecode 20.06.2018
CONVERGE 2.4.19 datecode 20.06.2018 | 665.2 mb
Convergent Science has updated its CONVERGE CFD (computational fluid dynamics) software. Apart from fixes in the detected issues, this version hosts a couple of noteworthy enhancements as well.
CONVERGE 2.4.19 is a minor release that includes enhancements and bug fixes.
Solver
Bug fix: Fixed an error that caused CONVERGE to crash in simulations with bothenergy_solver_f lag= 2 (i.e., the total energy solver) and species_dif f usion_model = 1 ininputs.in.
Bug fix: The steady-state solver imposes upper and lower limits on sensible internal energy(sie), but CONVERGE did not correctly determine these limits for cases with tabulatedfluid properties (tabular_f luid_prop_f lag = 1 in inputs.in). This bug has been fixed.
Bug fix: Fixed a bug that caused occasional crashes for simulations with both the MUSCLscheme and at least one FLOW_THROUGH boundary.
Bug fix: Previously the SOR algorithm did not always exit correctly due to an error in theomega cutting mechanism. This bug has been fixed.
Input
Bug fix: Fixed a bug related to bound_or_vector in dynamic.in. Previously CONVERGEchecked for a boundary ID even when bound_or_vector = 1, and this erroneous check couldcause the simulation to crash.
Bug fix: If there is an imbalance of elements between the reactants and products in anychemical reaction, CONVERGE now prints a warning message to alert you to theimbalance. Previously a bug prevented this warning from being written.
Bug fix: For NASA 7-formatted therm.dat files, CONVERGE now verifies the upper andlower temperature limits. Previously this check did not exist, which sometimes led to anout-of-bounds error.
Output/ Post-Processing
Enhancement: CONVERGE now writes more detailed screen output, including the meanand standard deviation of the monitored variables, for the steady-state monitor.
Enhancement: CONVERGE writes additional Reynolds stress quantities to turbulence.out.For simulations that have a different turbulence model, these quantities will have a valueof -1.
Bug fix: For parallel simulations, if some processors did not have wall cells for a given wallin wall_output.in, CONVERGE would crash. This bug has been fixed.
Bug fix: Some CONVERGE 2.4.18 simulations that contained monitor points and thatwere run on a Windows machine crashed. This bug has been fixed.
Bug fix: Fixed a bug that caused incorrect energy residuals for solid regions to be writtento residuals.out.
Bug fix: Fixed a bug that caused the firstpost*.out file to have the wrong time (in itsfilename) for steady-state cases that had been restarted.
Enhancement: Added the Carreau model for non-Newtonian fluids.
Enhancement: CONVERGE can now simulate compressible composite liquid species.Previously composites were not allowed for compressible liquids.
Boundaries
Enhancement: CONVERGE now automatically issues a warning regarding boundariesthat should be set as RELOFT boundaries. In addition, RELOFT boundaries now supportnormal motion via the new depend keyword.
Bug fix: For moving WALL boundaries with a 1D CHT temperature boundary condition,CONVERGE did not always maintain the correct coordinates for points on the boundary.This bug led to incorrect temperatures in the post*.out files.
Bug fix: Fixed a bug that caused some cases with both INTERFACE boundaries and fixedembedding at the INTERFACE to crash.
Bug fix: Fixed a memory access problem that caused CONVERGE to crash when aFLOW_THROUGH boundary coincided with a processor boundary.
Bug fix: Added checks and a warning message if the surface from a spatially varyingboundary condition is offset from the corresponding boundary.
Regions and Initialization
Bug fix: Fixed a bug that caused some cases to crash after region initialization.
Spray
Bug fix: For simulations with both the ELSA model and the cavitation model, CONVERGEdid not correctly identify the liquid species. This bug has been fixed.
Bug fix: Fixed a bug that caused some simulations with parcel_evap_model= 0 to crash.
Bug fix: The LISA breakup model gave incorrect spray parcel diameters for cases thatinvoked the steady-state solver. This bug has been fixed.
Bug fix: Fixed an error that very slightly affected the evaporated mass calculation in the Discretized Temperature Model.
Combustion and Emissions
Enhancement: CONVERGE now rereads the issim.in file during a restart if the start timefor the restarted simulation is prior to the start time of the spark specified in issim.in.
Enhancement: The ECFM combustion model can now run cases with multi-componentfuels.
Bug fix: Fixed several bugs in the detailed decomposition of urea model. These fixesimprove the computational efficiency of this model and make it more physically realistic.Results may change slightly.
Bug fix: Fixed a bug that led to incorrect soot predictions from the PM and PSM detailedsoot models for simulations that also used the user_mech_rate.c user-defined function.
Bug fix: Fixed some bugs in the ECFM combustion model that caused incorrect flamespeed values.
CHT
Bug fix: Fixed a bug that caused incorrect output temperatures (written to the post*.outfiles.) after super-cycling.
Bug fix: Previously CONVERGE erroneously allowed any type of boundary to be assignedto the super-cycling boundary group, and this error occasionally led to crashes. Newchecks have been added to ensure that each super-cycling boundary is INTERFACE orWALL (if WALL, the boundary must have a temperature boundary condition of convectionor Neumann) and that both the f orward and reverse sides of an INTERFACE boundary areassigned to the same stream.
VOF
Bug fix: Fixed several bug related to mass conservation for incompressible VOF modeling.
FSI
Enhancement: The FSI spring model can now accommodate a variable spring constant. Toinvoke this new option, specify a file name instead of a number for spring_constant inf si_spring.in and include a file that contains the spring constant data.
GT-SUITE
Enhancement: CONVERGE now calculates pressure boundary conditions by interpolatingbetween GT-SUITE's supplied pressure data and CONVERGE's region-average pressurefor gti_flag=3 and 13. This enhancement is an extension of the GT-SUITE enhancement in 2.4.18.
UDF
Enhancement: The CKWYP routine in user_mech_rate.c has been renamed.
Bug fix: Fixed a bug in the user_combust_rif .c routine. This bug prevent scalar_diss_rate.outfrom being written and it may have led to incorrect data in thermo.out.
Bug fix: Fixed a bug in the user_points_data.c routine that caused incorrect equivalenceratio data for the UDF monitor points.
Bug fix: CONVERGE incorrectly invoked user_spray_colide.c (instead of the correspondingsubroutine in the main code) when user_coalesce_f lag = 0 in udf .in. This bug has been fixed.
Bug fix: Fixed a bug in the Windows UDF code that caused a problem with the libraries.
CONVERGE Studio v2.4_062018 is a minor release that includes enhancements and bugfixes.
General
Enhancement: Made several improvements in the clarity, detail, and format of tooltips anddescriptions throughout CONVERGE Studio.
Bug Fix: Fixed a bug in which function keyboard keys (e.g.,F1) could not be mappedproperly to keyboard shortcuts (Edit > Keyboard Shortcuts).
Case Setup Module
Enhancement: Improved the Set Valve Lift tool capability in Boundary Conditions >Boundary. Now the tool runs faster and shows a progress bar.
Enhancement: Updated the Physical Models > Spray modeling >Urea dialog box. Now youcan import and export coefficients, clip items, and scaling factors for the molten solid ureaand detailed decomposition approaches.
Enhancement: For transient simulations, added the capability to perform calculationsbeyond just nozzle diameter and injection velocity in the Spray rate calculator (PhysicalModels > Spray modeling > Injectors > Tools).
Enhancement: Added a user-defined function (SAGE soot model) to UDF selection.
Bug Fix: Fixed a bug in Boundary Conditions > Boundary. Previously, deleting a boundary inGeometry > Boundary > Flag while the Case Setup > Boundary Conditions > Boundary dialogbox was open caused CONVERGE Studio to overwrite the configuration of the subsequentboundary with the configuration of the deleted boundary.
Bug Fix: Fixed a bug in Initial Conditions & Events > Mapping variables. Previously,importing a map.in file via the Import data from map.in button could cause CONVERGEStudio to crash.
Bug Fix: Fixed a bug in Physical Models > Spray modeling > Urea. Previously, importingearlier versions of urea.in could cause CONVERGE Studio to show an unnecessary errormessage.
About CONVERGE. CONVERGE is a revolutionary computational fluid dynamics (CFD) program thateliminates the grid generation bottleneck from the simulation process. CONVERGE wasdeveloped by engine simulation experts and is straightforward to use for both engine andnon-engine simulations. Unlike many CFD programs, CONVERGE automaticallygenerates a perfectly orthogonal, structured grid at runtimebased on simple, user-definedgrid control parameters. This grid generation method completely eliminates the need tomanually generate a grid. In addition, CONVERGE offers many other features to expeditethe setup process and to ensure that your simulations are as computationally efficient aspossible.
In this demonstration reel, we show the simulation of a number of different compressors, where CONVERGE CFD easily handles complex geometries, moving boundaries, and fluid-structure interactions (FSI). Adaptive Mesh Refinement (AMR) ensures that flow is resolved sufficiently, especially around valves.
About Convergent Science. Founded in 1997 in Madison, Wisconsin, Convergent Science is a global leader in computational fluid dynamics (CFD) software. Its customers include leading automotive and commercial vehicle manufacturers, tier one suppliers, and professional motorsport teams. Its flagship product, CONVERGE, is an innovative CFD software with truly autonomous meshing capabilities that eliminate the grid generation bottleneck from the simulation process. CONVERGE is revolutionizing the CFD industry and shifting the paradigm toward predictive CFD.
Product: CONVERGE
Version: 2.4.19 datecode 20.06.2018
Supported Architectures: x64
Website Home Page :
https://convergecfd.com/https://convergecfd.com/Language: english
System Requirements: PC
Supported Operating Systems: Windows 7even or newer / Server 2003 or newer
Size: 665.2 mb
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