How can I simulate a rotameter float to change height using Comsol?

[sohel0402034]

i am working with making a rotameter in comsol.i want to make a calibration curve (height of float vs. flow rate).

https://www.physicsforums.com/attachments/21281

https://www.physicsforums.com/attachments/21282

i failed to move the solid float through the pipe with velocity.how i can define the solid float in comsol? when i will give flow at bottom then how i can simulate the float to change the height. i have the necessary equation but i failed how i can change the position of the float??

its urgent please help...

 

[berkeman]

i am working with making a rotameter calibration curve (height vs. flow rate).

C:\Documents and Settings\sohel\Desktop\1.jpg
C:\Documents and Settings\sohel\Desktop\2.jpg

i failed to move the float through the pipe with velocity.when i will give flow at bottom then how i can simulate the float to change the height. i have the necessary equation but i failed how i can change the position of the float??

its urgent please help...

Your image uploads did not appear to work. I think for images, they need to be hosted on a website and linked to with the image tags. Maybe try uploading them as attachments instead...

 

[oswaler]

To simulate a rotameter float and its movement in Comsol, you will need to use the Fluid-Structure Interaction (FSI) module. This module allows for the coupling of fluid flow and structural mechanics, which is necessary for simulating the movement of the rotameter float.

To start, you will need to create a 3D model of your rotameter in Comsol, including the pipe, float, and any other components. Then, you can use the FSI module to define the fluid flow and structural mechanics physics involved in your simulation.

Next, you will need to define the material properties and boundary conditions for your model. This includes the fluid properties, such as density and viscosity, as well as the structural properties of the float, such as its density and stiffness.

Once your model is set up, you can use the FSI interface to couple the fluid and structural domains. This will allow for the transfer of forces and displacements between the two domains, allowing for the simulation of the float's movement in response to the fluid flow.

To simulate the float changing height, you can use a moving mesh or a prescribed displacement boundary condition on the float. This will allow you to define the movement of the float in response to the fluid flow.

Finally, you can use the FSI module to run a parametric study and generate a calibration curve for the height of the float vs. flow rate. This will give you a better understanding of how the float will behave in different flow conditions.

It is important to note that simulating a rotameter in Comsol can be a complex process and may require some knowledge of fluid mechanics and structural mechanics. If you are having trouble defining the solid float or setting up the simulation, it may be helpful to consult with a Comsol expert or refer to Comsol's documentation and tutorials.