After solving for Transient analysis, i need to see the effect on flow (flow vs time plot). But currently such plot is not available as a direct output unlike velocity, press, temp. Same is the case for plots available at monitoring points. So for this I need to extract flow values for every iterations / time steps from either summery file or from bulk results by creating a plane. This is very tideous procedure!
NEED "FLOW VS TIME" AS A DIRECT OUTPUT.
Calculating the mass weighted total pressure is important for internal compressible problems, valves turbines and compressors. It is the desired variable for compressor companies to run sub models to optimize the inlet and outlet transition regions before and after the compression stages. Last week I meet with a compressor company that is happy using another CFD tool for the compressor stage design but only have 1 user. For the inlet and outlet transitions they are don’t more design work and feel that our CFD is a better fit and cost effective to roll out to 100 design engineers to right size new products to address new market needs. To fit into their workflow they need to know the Total Pressure at the outlet and map effectively to their current compressor CFD tool.
I am working with BIG models ( BIG Buildings )
Starting the model in Revit and launcing the CFD directly.
I happend many times that I am not able to close the internal volums and afer many many hours I found few gaps of about 1 mm ,
In the construction arena with 100 m long building and wall width of 20 cm I do not care about 1 mm gape.
I am looking for a flag that I will be able to indicate the minimal gap to close the internal volume to be 1 cm.
I would like to be able to adjust the number of iterations during solving so I can cause the simulation to terminate earlier or later than originally intended, but not necessarily right now.
So if I originally asked it to run 1000 iterations, but based on how I see the solution evolving now I want it to stop at 500, I would like to be able to enter that during solving.
This could be useful during automatic mesh adapatation cycles where the convergence is happening sooner or later than expected. I may want the current cycle to terminate soon so it can go to the next mesh level.
Alternatively if I underestimated the number of iterations then I would like to be able to extend the run time without starting and stopping the simulatin - this is especially important for large files/remote solves.
Being able to adjust other termination parameters while solving would also be useful (i.e. stop time in a transient, as opposed to iteration number; adjust the intelligent solution parameters to looser or tighter criteria; etc.)
I need to complete a thermal simulation on the nose of an aircraft constructed of a carbon-fiber resin material. I have values for the in-plane and out-of-plane thermal conductivity. Considering the geometry of the cone, I can't enter the thermal conductivities oriented with a rectilinear coordinate system (as is necessary in the material editor for this type of material). The analysis is for cooling an electronics system through the aircraft skin.
With the ongoing prolifieration of composite materials, having this capability would be significantly beneficial. If Autodesk could incorporate this ability into their simulation tool, it would be a product differentiiating capability.
Create a phase change combustion module to show proper heat release and flame impingements. Having the ability to see post combustion chemical breakdown such as NOx or CO would be great but to be able to predict temperatures around combustion equipment is the primary desire.
I would like to be able to clone a results plane and/or copy settings from one plane to another. For example, if I had a plane set up with vectors, shading, etc. at X=0, then I could clone it align it with Y for a consistent look. Another use would be to make multiple cut planes (X=-1, X=0, X=1, etc) quickly with the same settings.
A similar idea I suppose could be applied to isosurfaces.
Often while checking the final meshcount I have to count the number of digits to make sure if the mesh is of the order of hundred thousands, millions or over 10 million. How about showing the number of elements by separating three digits with a comma? I know it's rather a trivial requiest but can come handy to quickly get the sense of enormity of mesh. There had been times where I have seen my colleagues submitting a job of 23 million mesh, thinking it was a 2.3 million mesh!
Give the option to show current iteration values on the convergence plot. Perhaps by the legend as shown below. Provide a checkbox to turn this on and off.
Edit: it would be even more useful if these values could also be in the same units as the main window (i.e. if I am showing PSI for pressure, show the convergence value in PSI, not the analysis units).
Ideally I'd like to have the surface meshing process to finish, even if it could not mesh a particular face, before the simulation aborts. So it could identify all surfaces with (mostly) too rough mesh sizes and put them into a geometry group which can finally be displayed and evaluated.
Would be nice to get more response from the startup process in case of "forgotten" settings, e.g.:
- for the use of gravity or compressed air you have to change to variable air
- Inlet has no temperature defined
Thought of something similar like the interactive diagnosis in Creo Simulate.
Improve the labeling for the advection schemes. 1-5 doesn't help, and every time I want to change it I have to go to the help file to remind me. Put the name and/or a short list of what it's used for in the dialog box.
Actually, to make it much more user-friendly make a wizard for different analysis types (internal compressible, pressure driven, AEC, natural convection, etc) that automatically pre-selects the right solution details per the help guidelines such as advection scheme, turbulence model, results outputs, etc. This would be pretty cool now that I think about it. (Just let me skip the wizard if I want to.)
Having a better understand of the problems that could be present in a model where meshing here.
We have had a file this week where the solid mesh was launching and after 30 minutes of working, no message came...
We discovered then that 2 adjacent surfaces were joined at a zero angle and so, should lead to a problem ; but not message in this sense..
After using the current user interface for most of this year, I have compiled a list of suggestions that I believe would be improvements. Much of the list are features that I miss from the older interface. Although the items seem fairly minor, I believe they could increase the efficiency of the UI.
- Add Coordinate Axis to View Cube. I personally dislike viewing the axis in the middle of the model, and change the default setting for this axis to be off. It would be nice if an axis could be attached to the View Cube, as was in the classic interface. It would also be convenient if the colors of the x,y,z axes would match the colors of the x,y,z velocity curves in the convergence plot.
- "Show Outlines" for results planes off by default. When I work with results planes the first thing I do is turn off "show outlines." The outlines are useful on occasion, but most of the time I prefer not to see them. If I could change a setting such that the outlines are "off" by default, that would eliminate a lot of unnecessary mouse movements.
- Hot keys. Assigning hot keys to commonly used commands would be a convenient time saver. Although the classic interface did not have user assigned hot keys, it did have a hot key that I found very usefull ... the "f" key was Zoom (Fit All). I still find myself hitting the "f" key, expecting to zoom out.
- Selection List window default to on. I refer to the Selection List window a lot when creating a model, particularly when working with multiple entities. I'd like to be able to set to Selection List window to be open by default.
The efficiency of the UI can be greatly improved by added a few customization features that would allow the individual analysts to personalize the software to match their particular workflow. It wouild be good if others would post their suggestions, as well.
Currently, if you want to change your units, when you already have results, you need to use a support share file.
It would be a better workflow if you could change your units in your active design study even if this had to delete the current mesh and results.
I would like to be able to simulate a nozzle that sprays water into an air stream. Ideally I would be able to view evaporation of the water into the air stream (evaporative cooling) and condensation of moisture from warm air onto the cold droplets of the spray (dehumidification).
Add the ability to define the resolution of static images when exporting. It would be nice to get some higher resolution images into my reports. Also, the text of the scale bare should be a standard vector-based font such as Arial so that it does not look pixelated.
This option would be especially useful when you are running with ISC enabled or free surface to get a better idea of how long the solver has progressed.
There is a common mis-conception, especailly with free surface, that the time step is always 0.01 (if using guidelines), when it is really based on the free surface courant calculation.