Hi have you checked the elasto-plastic material properties, perhaps that is already what you are looking for? These techniques for determining distances can be used in any model. We use the same General Extrusion component coupling, but only need to define a variable on the boundary of object B to compute the distance. Anytme you see an "eps" it is there to avoid a numerical instaility or a poure dicison by "0" or a INF trap generation -- Good luck Ivar. SZ- solid. Endpoints of the line that is the shortest distance between objects A and B d AB,min. What is the point in having a factor 4 when multiplying with eps? Now, I tend to think that to have a user defined yield function, it may not be so simple just to define an alternate expression but one should better look into the exact algorithm in COMSOL. The image below plots the contours of the distance and the direction vectors.

r=A*exp(-Ea/RT)*sqrt(C_O2)/C_CO As one can see, the concentration of oxygen includes square root, Can anyone help me this issue?. I just mentioned, sqrt, ^, and even + are all examples of operators.

COMSOL They live on boundaries and help you evaluate anything with. I have a derived value that computes a surface integral for each frequency solution, but the final result I want is the square root of all the surface.

Now, I tend to think that to have a user defined yield function, it may not be so simple just to define an alternate expression but one should better look into the exact algorithm in COMSOL. Best, Kodanda. Once we have computed this distance field on an appropriately fine mesh, we treat it like any other variable in our model.

Discussion Closed This discussion was created more than 6 months ago and has been closed.

We cannot recover the direction vector.

Sqrt in comsol support |
Log Out. SY- solid. We have demonstrated how to compute a distance field to a boundary within a model, the distances between boundaries, and the shortest line segment between two boundaries. Send a report to the moderators.
However, computing the 3D distance field does take a relatively long time, whereas calculating distances between boundaries and clearances is less intensive. Video: Sqrt in comsol support (11) Analysis: Integration - COMSOL 4.2 Tutorial Thank you for your time. |

### take square root of surface integral

As a COMSOL expression, this would be: * ewfd. Can you help by adding an answer? Answer. My only problem is with the last term under the square root: 4*^2*eps. Why should it be there at all? Furthermore, the variable eps.

I know COMSOL is working on the documentation, as there are several thousand pages to update, COMSOL covers more physics field than what I covered over 4 year at the university so this needs some time, specially since they changed to v4.

## real and imaginary computations in comsol

Log Out Log In Contact. For example, we can plot the distance field or make material properties dependent upon distance. Although the examples presented here are in 2D, they can all be generalized to 3D as well. We would love to hear what you come up with!

### Square root in equation

Sqrt in comsol support |
We then call these Minimum component couplings to extract the minimum distance.
Note that the Mesh search method is set to Closest point. We can use these variables anywhere that we want. Above all, the factor 4 in front of the term with "eps" is very strange, isn't it? If we have a meshed domain and a solution between the two objects, then we can plot the fields just along the shortest line between the two. |

## Square root in equation

Support for user-defined objects in COMSOL Script as well as many new functions for image . instance, division by zero or square root of a negative number. I am using Comsol with matlab and the following error is displayed while the same Sqrt of negative submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Although the examples presented here are in 2D, they can all be generalized to 3D as well. The definitions for the coordinates of the shortest line segment between two domains.

We can call the variables defining these coordinates anywhere we want. Log Out. In this case, we can use the Filter subfeature when making a volume plot.

Sqrt in comsol support |
I have been attempting to understand variable definitions in yield criterion for an elastoplastic material in Structural mechanics module.
OK Learn More. In this case, we can use the Filter subfeature when making a volume plot. Log Out. Best, Kodanda. |

The settings for the General Extrusion component coupling used to compute the closest point distance. In this case, we can use the Filter subfeature when making a volume plot.