Видео

Please check your mesh and boundary conditions carefully.

I'll provide a link to a directory where you can download the IGES file sample. This will be added to the updated description of this video shortly.

The velocity is defined as an analytical function (refer to the video at 3:01), and the outlet boundary condition is set to zero pressure.

Thanks for the suggestion! I’ll work on it and, once the model is ready, I'll create a video on it.

@@LearnwithSAI it would be really helpful if you can do it within a week,I'm actually searching for it and I need it badly for my project.,By the way thanks for the reply🙏🙏

Thank you for your kind words! To simulate a fan exhausting air from one room to another in COMSOL, you can follow these steps: Geometry Setup: Create the geometry for the two rooms and the connecting fan area. You can use simple 3D boxes for the rooms and a cylinder or opening for the fan. Physics Selection: Use the 'Laminar Flow' or 'Turbulent Flow' module, depending on the nature of the flow, to simulate air movement. Fan Definition: In COMSOL, you can use a 'Fan' boundary condition if you're modeling the fan explicitly, or you can define a velocity at the fan inlet/outlet. Alternatively, apply a pressure boundary condition at the outlet of the fan to simulate the pressure difference driving the flow. Inlet and Outlet: Set the inlet of the first room as an inflow boundary condition, where the air enters. At the outlet (the second room), set a pressure boundary condition or outflow condition at zero gauge pressure. Mesh Generation: Create an appropriate mesh for the geometry. Make sure to refine the mesh near the fan for better accuracy. Study and Solver: Choose a time-dependent study if the flow is transient, or a stationary study if it’s steady-state. Run the simulation to analyze the airflow patterns and exhaust performance. Let me know if you need more detailed guidance on any specific part of the process!

Hi, To simulate blood flow under a magnetic field, where the blood is modeled as a ferrofluid, you will need to couple fluid dynamics with magnetic field simulations. Suggested Modules: Magnetic Fields (mf): You are correct in assuming you can use the Magnetic Fields, No Currents interface if the current is not a factor in your system. This allows you to model the magnetic field acting on the ferrofluid (blood) in your simulation. Single-Phase Flow (spf): To model the flow of blood, you can use the Single-Phase Laminar Flow interface if the blood flow is slow and can be assumed to be laminar. If the flow is turbulent, you may need to switch to the Turbulent Flow module. Multiphysics Coupling: Use the Magnetic Forces multiphysics coupling to account for the interaction between the magnetic field and the ferrofluid. This will enable you to calculate the force exerted by the magnetic field on the ferrofluid (blood) and integrate that into the fluid flow equations. You may also need to define the magnetization properties of the ferrofluid based on how blood behaves under the influence of a magnetic field (e.g., defining magnetic susceptibility). Hope this will help.

@@LearnwithSAI hello. I modeled with mfnc and laminar flow module and I added kelvin force as a volume force where only kelvin force is added into momentum equation. (Lorentz force is negligible). The results look OK. Thanks!

Thank you for your question! I’ll be happy to explain the process of simulating fatigue life cycles in COMSOL and how you can visualize the number of cycles to failure soon.

@@LearnwithSAI yes sir please make it soon. I will be thankful to you

You're welcome.

Haha, love the Aperture Science™ reference! 😄 In this simulation, we’re firing the bullet, but the domain is tough enough to stop it without penetration. Maybe next time, we’ll have to fire 65% more bullet per bullet to break through! Thanks for watching.

To change the size of a 2D geometry in COMSOL, use the Scale feature under Geometry > Transforms to adjust the scaling factor for the entire geometry.

Directly resizing an imported geometry in COMSOL isn't as straightforward as resizing native geometries. However, you can resize an imported geometry by using the Scale feature as part of the Transform operations. Here’s how you can do it: Go to Geometry: Right-click on the Geometry node and select Transforms > Scale. Apply Scaling: In the settings for the scale operation, apply a scaling factor to resize the imported geometry. You can scale it uniformly or specify different factors for each axis (x, y, z). So while you can't manually modify dimensions like native geometries, the Scale operation allows you to resize imported geometries. Let me know if you need further help!

@@LearnwithSAI Thanks for this information.

Thank you for reaching out! While I’m happy to help guide you here with your particle tracing in laminar flow using COMSOL, I currently don’t offer direct contact outside this platform. However, feel free to describe your struggles, and I’ll do my best to assist you step-by-step. You can also share any specific issues you're facing, and I can provide detailed suggestions or solutions.

Yes, you can add an eigenfrequency study to the FSI in COMSOL model. Here's how you can integrate it: Add an Eigenfrequency Study: In the Model Builder, right-click the Study node and select Add Study > Eigenfrequency. This will allow you to calculate the natural frequencies and mode shapes of the structure, like the oscillating beam in this case. Multiphysics Coupling: Make sure the FSI is properly coupled with the Structural Mechanics and Fluid Flow modules. The eigenfrequency study will focus on the structure's response (oscillating beam) without fluid flow, or it can include fluid effects if needed. Boundary Conditions: Define the appropriate boundary conditions, such as fixing certain parts of the beam or specifying interaction forces between the beam and the fluid. Run the Eigenfrequency Study: After adding the study, run it to analyze the natural frequencies of the beam while interacting with the fluid.

You can check the steps from this tutorial "ruclips.net/video/klM30avz0eg/видео.html"

Thank you for the positive feedback! I'm glad the video was helpful. Regarding your question, the small circle in the middle typically represents a part of the geometry such as a hub or support structure that interacts with the fluid or affects the motion of the impeller. It's there to provide a more realistic simulation of the system. Yes, you can perform the simulation using only the big circle and the impeller, but the results might be slightly different as the smaller circle plays a role in how the flow interacts with the impeller. If you’re focusing on a simplified model or just the impeller’s behavior, you can try removing it and see how the results differ based on your simulation goals. Hope this helps, and feel free to ask if you have more questions!

Thank you for your question! While I currently provide guidance through comments and video explanations, I can definitely help you get started with modeling a membrane contactor for CO₂ separation. Feel free to describe your challenge in more detail here, and I'll do my best to assist you step-by-step. If you're interested in a specific aspect of the simulation, like setting up boundary conditions or choosing the right physics modules, let me know!

Thank you! I'm glad you enjoyed the video. To simulate the same model with natural gas, you’ll need to make a few adjustments: Material Properties: Update the material properties to represent natural gas instead of the default fluid. You can either select a pre-defined natural gas material from COMSOL's library or manually enter the properties (e.g., density, viscosity). Flow Conditions: If the flow conditions (like pressure or temperature) are different for natural gas compared to the original setup, make sure to modify them accordingly. Boundary Conditions: Check if any boundary conditions need to be adjusted based on the behavior of natural gas in your specific system. Feel free to ask if you need more detailed steps!

Thank you for your kind words! I'm glad you found the simulation helpful. While I’m happy to help you with guidance on stress and strain simulations for bones, I currently provide support through comments and video tutorials. Feel free to describe your simulation challenge here, and I’ll do my best to assist you step-by-step.

Hi, will upload soon.

Hi, You can explain on what you need on this email: learwithsai2377@gmail.com. I will check it at my earliest convenience.

@@LearnwithSAI Hi sir, thank you so much.. you will fined email with "COMSOL QUESTION" like object.. thaank you so much

@@LearnwithSAI Hi sir i can't find this mail adress, I think there's something wrong in it ! thank you

learnwithsai2377@gmail.com

@@LearnwithSAI I sent an email to this adress sir

You can go with either way, if you select model wizard then in the next step select 3D. OR if you go with blank wizard then you can select 3D from model component option.

Yes, please pause the video and insert those parameters in your model. Alternatively, I will share the file of parameters soon.

Can you tell the dimensional form equation of the following dimensionless equation 1.5*(1-(4*y^2))

You're welcome!

Please share your model at learwithsai2377@gmail.com. I will check it at my earliest convenience.

Thanks for the suggestion, will have a video on this topic in the near future.

Bro I tried but it’s saying invalid path , can you send me your file ? It’s will be great help for my project ❤❤

can you please explain your problem in detail?

@@LearnwithSAI Sir i want to simulate reynolds equation coupled with elastic deformation equation.Model is defined as a rigid sphere is resting on a hyperelastic wall separated by a lubricant and the load is applied to sphere which indents hyperelastic wall also there is a change in lubricant film pressure and thickness we need to solve using comsol generating the graphs of lubricant pressure and film thickness and also indentation depth . Problem is transient state.

May i contact you on email or some other app if feasible

Thank you for your question! To simulate a dissimilar material sample, such as a dissimilar welding sample, you’ll need to follow these steps: Geometry Setup: Create two different regions in the geometry to represent the two dissimilar materials (e.g., the two sides of the welded joint). Material Assignment: Assign different materials to each region in your model. You can either select materials from COMSOL’s library or define custom material properties for each. Contact and Boundary Conditions: For the interface between the two materials (the weld), make sure to define the appropriate contact conditions, especially if you want to simulate the interaction or bonding behavior at the joint. Study Setup: Set up the tensile or compression test similar to the tutorial but ensure that the loading conditions reflect the behavior of the dissimilar materials. Let me know if you need more detailed guidance, and I’ll be happy to assist!

Coming soon: A video showcasing the simulation of three-dimensional airflow over a sphere.

هل يمكن أن توضح لنا المشكلة التي تواجهك في المحاكاة بالتفصيل؟ سيكون من الأفضل أن تنشر سؤالك باللغة الإنجليزية.

Glad you liked it!

Thanks for the sugggestion. Will try and come up with a video on it.

Sure, thanks for the suggestion.

Sure, will make and share it soon.

Please sir can you help me with that

Will try and have a video in the near future.

The selected deforming domain under moving mesh is the main region where the beam oscillates.

Thank you for your interest! Unfortunately, I’m not able to share the file directly here, but I can guide you through the steps to create a similar model in COMSOL. If you have specific questions or need help with any part of the simulation, feel free to ask!

Thank you for your question! You're right to consider the lift force, and it can indeed play a role depending on the setup. In 2D simulations, inertial lift forces are generally not as prominent as in 3D, but they can still exist under specific conditions, especially in flows with high Reynolds numbers. If you want to include lift forces in your 2D model, you can manually add them in the Particle Tracing module by including an additional force term. However, in laminar flows at low Reynolds numbers, lift forces tend to be minimal, which is why they may not always be included by default.

Please consider this velocity funation: 𝑈𝑖𝑛𝑙𝑒𝑡=[8 sin( 𝑡𝜋/6)+12]

Thank you for your question! To compute particle temperature in COMSOL, you need to couple the Particle Tracing module with a Heat Transfer module. Here’s a general approach: Activate the Heat Transfer in Fluids: Add the Heat Transfer in Fluids module to your model to account for temperature distribution in the fluid. Enable Particle Temperature: In the Particle Tracing for Fluid Flow module, go to the Physics tab, and select Heat Transfer to Particles. This will allow you to track the temperature of the particles as they move through the flow. Set Initial and Boundary Conditions: Define the initial temperature of the particles and apply appropriate boundary conditions for heat transfer between the fluid and particles. Run the Simulation: After setting up the above, run the simulation to compute the temperature distribution of both the particles and the fluid. Let me know if you need more detailed guidance on setting this up!

Thank you so much for your kind words and for your detailed observation! You’re correct in noting that I defined additional parameters like SLC, which were not explicitly used in this particular model. Sometimes, I prepare parameters in advance for possible extensions or future adjustments, but they weren’t necessary for the contact definition in this case. Regarding contact forces, if you’re simulating more complex behaviors like friction or adhesion, you’re right that adding those elements would improve the accuracy. You can go to the Contact Pair settings and enable Friction or Adhesion in the Contact branch under the Solid Mechanics module. These additional settings will allow you to define the coefficient of friction or adhesion forces as needed for your simulation. Thanks again for pointing that out!

Thank you for reaching out! While I currently provide support through comments and tutorials, I'd be happy to guide you step-by-step on how to create a 3D model for gas expansion in COMSOL. If you have specific details about your setup (like boundary conditions or materials), feel free to share them, and I can help you get started on the model.