Search Results

User Name Remember Me Password

Showing results 1 to 11 of 11 Search took 0.00 seconds. Search: Posts Made By: FMDenaro

Forum: Main CFD Forum July 1, 2023, 05:39

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro You can have some idea about the LES no-model... You can have some idea about the LES no-model results for several codes here: ...

Forum: Main CFD Forum June 30, 2023, 11:11

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro Some hints: - unresolved DNS means that... Some hints: - unresolved DNS means that both the grid size and the discretizations act as a filter on the smaller spatial components of the flow. At this point, one has only the implicit action...

Forum: Main CFD Forum June 29, 2023, 16:58

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro My suggestion is to start simplifying the... My suggestion is to start simplifying the geometry as much as possible. But ... it would be good if you first use your code, in no-model condition, to simulate a standard case like the plane...

Forum: Main CFD Forum June 29, 2023, 16:33

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro A too large filters size (that is grid size) has... A too large filters size (that is grid size) has effects in the range of resolved components but this is not the only effect. I don't know the type of discretizzation and the accuracy order you...

Forum: Main CFD Forum June 29, 2023, 16:01

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro URANS solution is based on the idea of a... URANS solution is based on the idea of a time-averaging or ensemble-averaging. Thus, the variables differs from the LES no-model where you have a spatially filtered variable. A better...

Forum: Main CFD Forum June 29, 2023, 15:25

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro To be honest, 1 million nodes seems to be a too... To be honest, 1 million nodes seems to be a too low resolution to trust in the results. However, you have to realize that the variables resolved in URANS cannot be compared to those you get from...

Forum: Main CFD Forum June 29, 2023, 14:14

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro You can't make public the details here ? ... You can't make public the details here ? Use the email: denaro@unina.it

Forum: Main CFD Forum June 29, 2023, 13:50

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro No, the local cel Re number says only if you are... No, the local cel Re number says only if you are resolving or not the lowest turbulent structure. Only the computation of some high order statistics can assess if your simulation is acceptable....

Forum: Main CFD Forum June 29, 2023, 13:36

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro No, the pile-up can exists without leading to a... No, the pile-up can exists without leading to a numerical instability. You can have some situations where this energy pile-up is balanced by the diffusion terms in the local truncation error. The...

Forum: Main CFD Forum June 29, 2023, 13:07

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro First, you have to run a 3d case for a sufficient... First, you have to run a 3d case for a sufficient number of time units in such a way to disregard the memory of the arbitrary initial conditions. Generally, that happens when the volume averaged...

Forum: Main CFD Forum June 29, 2023, 12:18

Replies: 26 Why "no turbulence model" looks more realistic Views: 870 Posted By FMDenaro What you are asking is if an unresolved... What you are asking is if an unresolved simulation where no closure model is explicitly supplied can work or not. This topic is well documented in literature, denoted as "unresolved DNS" or better...

Showing results 1 to 11 of 11

Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home General Forums     Main CFD Forum     System Analysis     Structural Mechanics     Electromagnetics     CFD Freelancers     Hardware     Lounge Software User Forums     ANSYS         CFX         FLUENT             Fluent Multiphase             Fluent UDF and Scheme Programming         ANSYS Meshing & Geometry     Autodesk Simulation CFD     AVL FIRE     COMSOL     CONVERGE     Fidelity CFD     FloEFD, FloWorks & FloTHERM     FLOW-3D     OpenFOAM         OpenFOAM News & Announcements             OpenFOAM Announcements from ESI-OpenCFD             OpenFOAM Announcements from OpenFOAM Foundation             OpenFOAM Announcements from Other Sources         OpenFOAM Installation         OpenFOAM Meshing & Mesh Conversion         OpenFOAM Pre-Processing         OpenFOAM Running, Solving & CFD         OpenFOAM Post-Processing         OpenFOAM Programming & Development         OpenFOAM Verification & Validation         OpenFOAM Community Contributions             OpenFOAM CC Toolkits for Fluid-Structure Interaction         OpenFOAM Journal         OpenFOAM Bugs     Phoenics     REEF3D         REEF3D News & Announcements     Siemens         STAR-CCM+         STAR-CD     SU2         SU2 News & Announcements         SU2 Installation         SU2 Shape Design Mesh Generation & Pre-Processing Software     ANSA     enGrid     GridPro     Pointwise & Gridgen Visualization & Post-Processing Software     EnSight     FieldView     ParaView     Tecplot Special Topics     Mesh Generation & Pre-Processing     Visualization & Post-Processing CFD Online Community     Site News & Announcements     Site Help, Feedback & Discussions     CFD-Wiki