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24 Threads found on Mesh Operation
This is a modeler error. HFSS mesh can deal with it if you tell to skip modeler check going to: modeler/validation setting/ 135420
And possibly a way to get around it? A non-converging simulation typically means the mesh is not adequate. Assign an initial seed mesh ("mesh operation") to the cavity dielectric, and make sure it's relatively dense. This should speed up convergence.
To get a seed mesh, place a vacuum object (or unassigned surface) wherever you have very small gaps in the PEC/copper. Then, right click on the object and select "Assign mesh operation". Select Length-based, and for the minimium mesh size choose the smallest feature size (pitch) of the gap. This will ensure that HFSS creates (...)
Hello, I am trying to simulate a larger coil in Q3d but it is taking a lot of time to simulate. Does changing the mesh operations makes the simulation faster???? How can the mesh operations be changed??? Can any one help me out in this???? Thank you in advance...
HFSS solves in frequency domain theoretically unrelated to the frequency scale. So it stacks in the mesh size. If I am not mistaken, technically it is limited by word precision (supposing they use 64bit processor PFU words) and machine accessible RAM size. I believe, it is from several Hz to optical region (depending on the problem size,
Hello, Does anyone know how I can set the coarsest mesh? My solution frequency is 8.4 GHz, but the whole structure is 500 mm by 500 mm by 500 mm that HFSS runs out of memory when I run the simulation. I always used default meshing, but what should be the maximum length or maximum number of elements? Thanks in advance.
Hi I am trying to simulate a spiral coil with HFSS. when the distance between winding is small -(wire dia 0.3mm - when gap is below 0.1mm) I believe the HFSS relate the coil as one chunk of copper. I see it from the resistance and inductive results. is there a limit to the gap the hfss can calc? can I fix it using smaller mesh size? the mesh is
I'm simulating a conductive ink trace on a dielectric substrate. The microstrip is long and it's thickness is smaller than the skin depth. IE: Length = 500mm, Width = 0.5mm, Thickness = 10um; Skin Depth = 100um, f = 150MHz I know typically when simulating conductors that are larger than the skin depth in HFSS, solve-inside is not set and HFS
You can set the mesh size by assigning 'mesh operations' (right click on object -> Assign mesh operation). Use a minimum length setting to get the results you want (e.g. 0.01nm). I'm not sure if that will solve your problem, let us know. Good Luck!
meshing is a time consuming action and reducing this precious time can cause a tremendous improvement in our field. I was wondering if it is possible to import initial mesh from another similar design and apply it to a new created design. is it possible? I am working on a SIW cavity backed antenna which is geometrically symmetric, but the radia
I've gone though the "UHF Probe" example in the HFSS manual, and have have noticed something odd. In the tutorial it says "Far fields are calculated by integrating the fields on the radiatiuon surface. To obtain accurate far fields for antenna problems, the integration surface should be forced to have a lambda/6 to lambda/8 maximum tetrhedra
I cannot find a good explanation for the error "mesh leak is found for certain objects, do geometric repair on certain objects". The project I am working on has a significant amount of small objects. I am assuming that hfss is having a hard time meshing properly. I have already tried changing model resolution. Anyone have any suggestions.
Hi Techi Take a glance at HFSS> mesh operation What is your simulated structure?
I am designing rfid tag antennas(860-960 mhz) using hfss 12.1, can someone help me whats the best use of mesh operation function for increasing the accuracy of the simulation? thanks
Hello, I want to limit the complexity of mesh used in my simulation, because it´s too high (about 200k-300k). I can do it defining a mesh operation and aplying it, but when the simulation starts this limit is not respected. Doy you know how to limit it? I tried using PML to decrease the size of the air volume around the (...)
i try to design a microstrip patch antenna with a trenches in substrate at 10 GHz and i assign a special mesh operation (element length 1mm) for the trench only and let the other objects in the design meshed with default scheme but i'm not sure that if this is wrong or true for having more accurate results can any one help me on (...)
The mesh plot is very useful to see if your structure's details and discontinuities are meshed small enough. Please note that the RF current typically flows at edges of metal, so mesh your edges well. This goes for your bow-tie also.
Hello, does somebody know which mesh type is to chose in HFSS for plane structures? And if I have a radiation box which mesh type is to select for this. I have read that for round structures with surface approximation the result will meet fast the convergence criterion. And to decide whether the mesh is good the optical look is (...)
Hi all, I am using HFSS 11.1. In HFSS, it is possible to select a particular object and assign mesh operation, for example to limit number of mesh. Before we actually run the simulation, it is also possible to do "apply mesh operation" to see the initial mesh. However, this initial (...)
Using "On selection" "Length Based" feature of the "Assign mesh operation" one can improve the meshing on the surface. Very nice feature, but the mesh is fairly equal on the whole surface (center and edges). What I would like to do is to improve the mesh on the edges of the surface (where current (...)
Hi all, What is exatly "seeding the radaition boundary to at least lambda/10" ? If I lick on the rad-boundary / right click/ Assign mesh operation / On Selection. Then: Length Based or Skin-Depth Based ? If Length Based, then: Maximum Length of Element: 600 mm ? (or something = lambda/10) ? Thank you for your help?
These days I'm trying on a 40db coupler and the isolation is respected to be greater than 25db,while by using HFSS9.0 I got only 20db.How to improve the fact? I used a stripline coupler,a very simple can see from the photo. Hope someone nice can help me ~~please. Another,how to perform the mesh operation?I mean in a model some part for
Have you tried defining a mesh operation->surface approximation on the object ? Itai
Hi, 27k unknowns are not big deal for HFSS, i forgot the exact maxium number of unkonws for HFSS. Take a look at the S-parameter of the convegence rate, it seems this structure is osilating, I have no preknowlege of this kind of structure, I can not tell which part is the most critical part, but you can try to put some dummy object in the critical