https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/en-USTelligent Community 13https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfdTue, 29 Sep 2026 14:43:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:31f4010a-08b6-4017-a816-5d3f45a25d36https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/Tue, 29 Sep 2026 14:43:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:73606775-e2f8-4e9e-89a5-7d8d90cd43b9https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74308/review-model-settings-on-large-scstream-model/1432770Mon, 13 Jul 2026 01:39:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:b53ae961-e7af-463a-ad0b-f14181c55183Oscar Lorenzo RodriguezHello Nobuyuki, Thank you very much for your detailed answer, this is what I was looking for! I see I have different tools to review the setup and mesh efficiently, I'll use them on my model Thank you again, have a great day.https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74308/review-model-settings-on-large-scstream-model/1432769Fri, 10 Jul 2026 09:09:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:c19e5bb3-d2cc-4e9e-af38-c457d34e07bfNobuyuki OshitaniHi Oscar, Thank you for posting questions. What I suggest is using the [Parts Table] or [List of Parts] dialog. There are two ways to open these dialogs. (1) Check all parts at once Click the [Parts Table] icon on the toolbar Select [Part] from the drop-down menu at the top This table provides information such as the material property name, initial temperature, heat source and emissivity. Another useful piece of information available in this table is the volume/area ratio between the original part volume/area and the mesh volume/area. This can be used to verify whether the original part volume has been maintained after meshing. (2) Check selected parts from the part tree Select the part(s) or group(s) in the part tree, right-click and select [Show Parts List Dialog] This displays part information only for the selected part(s) or group(s) The information available is the same as described above. However, this method is useful when there are thousands of parts and you want to review them section by section or group by group Regarding the contact condition you mentioned, if you have defined contact thermal resistance between parts, the condition for each part pair can be checked under the [Conditions] tab in the [Tree/List View Window]. If you want to check whether parts are physically contacting each other, you can use [Mesh] - [Checking Parts Interferences]. To use this feather, select the part either the part tree or the draw window after clicking the [Select] button. You will then see a list of part(s) which are in contact with the selected part. This function can be used after meshing has been completed. I hope this helps. Please let me know if you have any additional questions.https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74308/review-model-settings-on-large-scstream-modelFri, 10 Jul 2026 07:53:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:5f310126-d102-4659-becc-1af53cacd629Oscar Lorenzo RodriguezHello community, I am working on an electronics cooling model in scSTREAM that contains hundreds of components, with many different heat sources, materials, contact conditions, and other settings. To manage the model more efficiently, I organized the parts into folders and use them to apply conditions in bulk, which is very convenient. However, as the model grows, it becomes increasingly difficult to verify that all conditions have been assigned correctly. I wonder if there's a way in scSTREAM to review model settings in a consolidated or summarized view, so I can quickly identify potential setup mistakes before running the analysis. For example, I would like to confirm that every component has the correct material, heat source, contact condition, and other key properties assigned, without having to inspect each part individually. Is there an efficient way to perform a final sanity check of the model setup? Thank you for the help! Kind regards.https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74303/scflow-heat-transfer-between-fluid-and-solid-across-a-mesh-interface/1432758Mon, 06 Jul 2026 10:38:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:c03db707-8aeb-4973-9fe3-ae3de807196dDavid WelshHi Laurent Delmas . Thanks for your reply. I referred to the exercise that you mentioned and I've got the heat transfer working now. I also saw a note on the main page for the Function 16 exercises: Regions where the discontinuous mesh condition is set are excluded from boundary conditions of undefined regions. So this confirms why the default condition was not applied to my discontinuous interface. I think it all makes sense now. Regards, - Davidhttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74301/acoustiucs-reference-pressure/1432753Fri, 03 Jul 2026 07:49:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:9822e5a2-512f-4ea2-b1ce-60e4bae80199Christophe GayetIt's a pleasure. I got your inquiry, I will reply through this channel. Best regards, Christophehttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74301/acoustiucs-reference-pressure/1432752Fri, 03 Jul 2026 06:01:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:a661e39f-6aaf-4712-81db-6c0efea2c380Smit LakdawalaHi Cristophe, Thanks for your suggestion and I wrote an inquiry to mentioned e-mail address. Looking forward for your response. Thanks again!https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74301/acoustiucs-reference-pressure/1432751Fri, 03 Jul 2026 05:17:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:c3ad13a5-35b6-4af4-85d2-a9aed99857f6Christophe GayetDear Smit, Sorry for the late reply. I think that you are talking about this reference pressure used in scPOST, in the Frequency tab of the Graph object, right? If so, you are right the reference pressure used is 20µPa, which is for air medium. Unfortunately it is hardcoded. There is way to change it and I can explain you how to do through a support inquiry from you using the following e-mail address : cradle. support@mscsoftware.com . In addition, as the Pref_air is 20*Pref_water, you can also add 26.02 dB (20*log_10(20) ) to the obtained signal. It's a shift of the curve. Hope this helpshttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74303/scflow-heat-transfer-between-fluid-and-solid-across-a-mesh-interface/1432749Wed, 01 Jul 2026 02:08:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:40b4b1d4-ee36-48e3-8e9f-9610f26959e5Laurent DelmasHi David Welsh , thanks for your question. at least the issue is not from the external mesh but from the discontinuous interface. Even if you register some discontinuous interface between fluid and solid, thermal boundary should be set individually as those surfaces does not belong to undefined region. You can have a look at exercise 16.3 that handle this question: "Frictional heat analysis of solids" hope this is helpful regards Laurenthttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74303/scflow-heat-transfer-between-fluid-and-solid-across-a-mesh-interfaceTue, 30 Jun 2026 16:15:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:63c075f2-96e0-4638-bf21-926c6e6c696bDavid WelshI'm working on an scFLOW simulation where I can't get any heat transfer between fluid and solid regions. I can't share the proprietary geometry, but the model concerns de-icing of an aircraft wing and it's essential that hot internal air transfers heat to the solid skin. The mesh was created in STAR-CCM+ and includes both the fluid and solid regions, but is nonconformal in that nodes don't appear to be shared between the fluid and solid mesh regions at the interface between them. I'd hoped that nothing special would be needed to get heat transfer between the regions, but the scFLOW default heat transfer condition for fluid:solid contact doesn't seem to be applied. I have tried defining a discontinuous mesh interface for the fluid:solid interface and manually applying a heat transfer condition to it, but this didn't help. I also tried applying a heat transfer condition to the registered surfaces on both sides of the interface, but this also doesn't help. Can you please suggest a way to get the heat transfer to work? Re-meshing in scFLOW would probably fix the problem, but it's important that I (at least initially) use the STAR-CCM+ mesh. Thanks for any help you can provide, - DavidscFLOWPreCradle CFDscFLOWhttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74301/acoustiucs-reference-pressureMon, 29 Jun 2026 05:39:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:8bbe48d8-5956-4726-8c5c-a434ef4f89e7Smit LakdawalaI am modleing the case for underwater marine application sound. In this case, how to set up acoustics reference pressure for water as medium as it will be diffrent from air (20 micro Pa)?https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74290/scstream-turbulent-transient-thermal-simulation-is-difficult-to-converge-how-can-it-be-improved/1432733Mon, 22 Jun 2026 22:07:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:996a284c-1936-4860-aaf9-be3957aaae15Nobuyuki OshitaniHi Huijing, Thank you for posting your question, and I apologize for the delayed response. Based on your description, although I do not have full visibility into your model setup, it appears that the turbulence may be unstable in your transient analysis. One possible approach to address this issue is to increase the inflow turbulence properties(the turbulent kinetic energy and turbulent dissipation rate) at the inlet boundary condition. In some cases, higher values (i.e., introducing more turbulence) can help stabilize the solution. Another possibility is that the behavior you are observing is due to vortex shedding, which is inherently unsteady and may lead to fluctuations in the solution. If this is the case, some level of instability may be physically expected. If the issue persists, I recommend contacting technical support so that we can review your model in more detail and provide more specific guidance tailored to your setup. Best Regards, Nobuyuki Oshitanihttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74290/scstream-turbulent-transient-thermal-simulation-is-difficult-to-converge-how-can-it-be-improvedTue, 16 Jun 2026 01:05:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:9930e088-d2fe-40e7-880d-84dc6225c59aHuijing HuThe transient thermal simulation of turbulence is difficult to converge. The mesh quality is okay, but even after trying different time step types, it still does not converge. 保存图片预览大图复制图像取消 保存图片预览大图复制图像取消Cradle CFDscSTREAM熱設計PACHeathttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74283/how-to-reuse-material-properties-created-in-another-project-cab-file-in-scstream-preprocessor/1432717Fri, 29 May 2026 13:39:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:d2d29a8c-b460-4e1b-a946-15a5d92a4165Nobuyuki OshitaniHi Shehroz, Yes, I was able to reuse material properties from my previous projects, which saved me time. Thank you very much!https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74283/how-to-reuse-material-properties-created-in-another-project-cab-file-in-scstream-preprocessor/1432715Fri, 29 May 2026 13:08:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:456043ac-0c07-4cb3-81ea-101e6fc432edShehroz ButtHi Nobuyuki. Thank you for your question. I can confirm that it is possible in Cradle scSTREAM to create material properties and then reuse them to another project without the need to recreate them. You would need to export the material properties to a property file (*.xml) and then import this file into your new project. See the steps below: 1. Export Material Properties from the Source Project: - Open your existing project in the scSTREAM Preprocessor. - Add or edit the material properties as needed in the list of materials dialog - Go to the Menubar and select [File] > [Export]. - Choose [Property Files (*.xml)] and save the file to a desired location. 2. Import Material Properties into the New Project: - Open the new project in scSTREAM - In the Initial Wizard, for [Property file] Select the previously exported *.xml property file and click [OK] alternatively : You can simply drag and drop the .xml file into the Pre-processor draw window and the material list would update accordingly - In the message window at the bottom of the Pre-processor screen, you should be able to see the material list being updated. 3. Managing and Updating Material Properties: If you want to add more materials in the future, you can overwrite the property file or create a new one, update the file path in the Initial wizard (or Drag and Drop the new .xml file in Pre). For additional information, you can refer to the following knowledge article: How to save and use material property data | Knowledge | Salesforce Hope this helps. Best regards, Shehrozhttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74283/how-to-reuse-material-properties-created-in-another-project-cab-file-in-scstream-preprocessorFri, 29 May 2026 07:27:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:3adbc7b9-63ec-49af-8a85-8e8e7876823aNobuyuki OshitaniI created several laminated materials for a PCB, along with a few solid materials. I would like to reuse these materials in another project. Could you please advise on how to reuse material properties from an existing project (CAB file) in the scSTREAM Preprocessor?https://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74274/physical-meaning-of-far-field-under-aerodynamic-sound-tab/1432707Sun, 24 May 2026 13:39:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:ea2f0e34-bdf4-4274-b2e9-b7d64a4ca7a8Sunil VytlaHi Smit, For FWH analysis, far-field static pressure only affects the mean pressure level at the observer locations. Since acoustic quantities depend on pressure fluctuations, the far-field static pressure is not a particularly critical parameter for FW-H acoustic predictions. So to answer your question, I will recommend setting the far field pressure to 0 Pa, simullar to what we apply at the outlet. I hope this answers your question. Regards, Sunilhttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74275/meaning-of-representative-length-for-aerodynamic-coefficient-output-in-scflow/1432697Wed, 13 May 2026 20:47:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:7192b3c3-5d3b-47b9-b690-a937df49a0eeDavid WelshYou're welcome, Rodrigo! Thanks for your confirmation. Regards, - Davidhttps://community.cadence.com/cadence_technology_forums/physical-system-simulation/cradle-cfd/f/cradle-cfd/74275/meaning-of-representative-length-for-aerodynamic-coefficient-output-in-scflow/1432696Wed, 13 May 2026 17:24:00 GMT75bcbcf9-38a3-4e2e-b84b-26c8c46a9500:7f798d8f-fa90-4d36-8203-bf1b18f4571eRodrigo Auza GutierrezThanks for your detailed answer, David! It all makes sense now!