Learning Forum

[jojo]

In a magnetostatic analysis, I am trying to simulate the magnetic fields of a ring magnet.

I want  the magnetic polarization is a negative x polarization is in the negative radial direction of a cylindrical coordinate system.

I created a cylindrical coordinate system.

I used the Material Polarization setting in the Details view  to orient a polarization axis toward a negative x .

However,  when I analyzed the magnetic field, the direction of the magnetic field was in the positive radial direction. 

What should I do ?

[Navya C]

Hi,

Select the correct coordinate system and direction in the view/Edit material window.

Refer to the below screenshots.

If this answered your question, please mark the appropriate answer as 'Is Solution' for the benefit of others in the community.

[jojo]

Hi, 

Thank you for your reply.

I am using Mechanical to perform analysis.

Is the screenshots Mechanical?

I could not find this view/Edit material window.

Regards

[Navya C]

Hi,

You mentioned that you are in a magnetostatic analysis in your first post. 

If your interest is to find the magnetic field distribution and forces you should use Ansys Maxwell, not Ansys Mechanical.

The screenshots I have given are from Maxwell not from Mechanical.

If this answered your question, please mark the appropriate answer as 'Is Solution' for the benefit of others in the community.

Regards,

Navya

[jojo]

Hi,

Thank you for your reply.

I am using ANSYS student, so Maxwell cannot be used.

However, since I want to know the values of magnetic field and magnetic flux density, I think that Mechanical is sufficient.

Is it impossible for Mechanical to direct the magnetic polarization in the negative radial direction of the cylindrical coordinates?

Regards

[Aniket]

I hope you have taken a look at:

https://ansyshelp.ansys.com/account/Secured?returnurl=/Views/Secured/corp/v194/wb_sim/ds_static_electromagnetic_analysis_type.html

already, if not can you please check this?

-Aniket

How to access Ansys Online Help Document

How to show full resolution image

Guidelines on the Student Community

How to use Google to search within Ansys Student Community

 

[jojo]

Hi Aniket,

Thank you for your reply.

I have looked this page.

In this page, 

Note: In a magnetostatic analysis, you can orient a polarization axis for a Linear or Nonlinear Hard material in either the positive or negative x direction with respect to a local or global coordinate system. Use the Material Polarization setting in the Details view for each body to establish this direction. The Material Polarization setting appears only if a hard material property is defined for the body. For a cylindrical coordinate system, a positive x polarization is in the positive radial direction, and a negative x polarization is in the negative radial direction.

 I set the model according to this message, however a negative x polarization did not become in the negative radial direction.

Regards

[Aniket]

Posting on behalf of wrbulat (Bill). Thanks for your patience!

---

Hi Jojo,

As an example, I created a hypothetical linear PM material in Engineering Data:

I assigned the PM material and a cylindrical coordinate system to a ring with polarization in the x-direction:

 

I set a flux parallel condition on the exterior boundary of the spherical enclosure:

and get flux density pointing radially inward:

 

Incidentally, we suggest that you set the following variable using Tools > Variable manager to use the newer SOLID236 electromagnetic solid instead of the older and now undocumented SOLID117:

I hope this helps you!

Best,

Bill