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Midas NFX 2019

System Requirements: Windows

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Midas NFX is an integrated finite element analysis program for structural, CFD simulation and optimization design. It provides efficient and accurate analysis together with an integrated pre-post processor, developed by senior mechanical engineers with over 20 years of CAE software development expertise.

The 2019 version of midas NFX contains several improvements for topological optimization, contact feature, CFD boundary condition definition and post-processing tools.

What's new

New View Controls In everyday practice there is a need to display the graphical result of a certain angle or rotate the model.

In such case, you can use the newly added specific angle rotation function. Type or select the angle you want to rotate and click the icon in the direction you want to rotate.
Result Extract new option New option has been added [Object] to output the results from nodes or elements. Up to the previous version, you have to select the desired joint for each increment by using the "Result Tag" function to output the average value of the stresses of the joints.
Line to Line contact In addition to existing face-to-face, point-to-face contact, line-to-line contact functionality has been added. It can be used effectively when in-plane direction and out-of-plane direction of a model composed of two-dimensional shell elements occur. Line-to-line contact supports welded and normal contact. Welded contact is available for all analytical types, and general contact functionality is available for nonlinear static analysis, and implicit/explicit nonlinear dynamic analyses. It can be defined using automatic contact and manual contact function of line-to-line contact.
Manufacturing Conditions Topology Optimization In the phase optimization analysis, the resultant shape can be derived by considering the manufacturing conditions. If you use "molding direction" among the manufacturing conditions, you can use unidirectional, bidirectional, and penetrating, and only the whole rectangular coordinate system can be used as the reference coordinate system. However, if the analytical model is not parallel or horizontally parallel to the orthogonal coordinate system and is tilted to a certain angle, or if the direction to be extracted must be generated along a particular curve, there was a limit to the existing functionality.

In the 2019R1 version, we have developed the manufacturing condition definition method to be able to define a total of six conditions as linear extrusion, curved extrusion, unidirectional casting, bidirectional casting, symmetry and minimum thickness. Compared with existing product version, it is as follows.
Reynolds stress turbulence model Reynolds stress turbulence model has been added. Model is suitable for vortex flow with biased characteristics like cyclone. Unlike previous models that model Reynolds stress through turbulent viscosity, it directly reflects the six independent components of the Reynolds stress tensor. We can overcome the fundamental limitation of isotropic turbulence assumption that turbulent viscosity models have. When using the Reynolds stress turbulence model, we recommend using the hybrid (accuracy) method for the element application formula in the analytical control option.
Overset Mesh – 3D Solid Elements Existing overset mesh feature could not contain solid elements. For example, heating of objects by hot air was impossible to simulate.

The NFX 2019R1 release improves overset mesh functionality to include solid elements.
Wall Translational Motion The newly added translational wall motion effect gives you wall speed with applied wall laws when the wall moves in the translation direction.
Penetration- Particle Wall Type This wall option allows to define surface through which the fluid and particles can freely pass. Use this to determine the number of particles that pass through that face.
CFD-Spring/Damper system The newly developed overlapping mesh function can analyze motion caused by the fluid force of an object connected to a spring-damper system.
Collision Wall Collision between wall and wall can occur when analyzing simultaneous flow and free motion of a nested mesh. At this time, it is possible to simulate the collision after the collision between the walls registered by the collision wall function. Consider the coefficient of restitution to calculate energy conservation after impact.
Heat Source - Volumetric heat In the conventional complex heat transfer analysis, the volume calorific value was entered at the stage of defining the material. The "heat" function of the midas NFX 2019R1 is more convenient because it can give different calorific values for each element or part (independent volume).
New CFD function parameters Parameters that can be used in the fluid analysis function have been added. By including heat flux, node area, and node volume in the function, it is possible to utilize more functional flow analysis function. The heat flux output and the nodal area output refer to the user-defined boundary condition name because the boundary must be specified.

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