Hello everyone.
So in the last video I showed how to create the geometry and the material.
So let me delete this because it is not important in our case to delete the spear.
Totally cool B lol.
I have admittance return is copper.
OK.
Now let's talk about mashing.
Let's go to mash physics control mash.
You can uh fine fine.
You see I have a MASH which has been created to do this simulation and I can select extra fine billion.
It will be big.
Now what is missing.
Let me talk about it.
For example I have a square a square sheet of copper.
OK a three dimensional squared.
Now I have three hundred degrees heat source at one side and zero degree at the other end maybe a small
region it having a contact of zero degrees.
Now if I ask you at the equal to zero point zero three seconds how will the heat provide look in this
upper sheet.
So the way to solve it is you have a differential equation the heat equation you set up the boundary
condition that at equal to zero.
This is 300 degrees Celsius.
This small region is zero degrees Celsius.
And you try to solve this problem and rest of the edges are at room temperature.
Okay.
So how do you solve this.
You divide the 3D model into small parts.
Okay.
And in each small part you solve our differential equation and then you integrate over the whole region.
This is how you solve a problem right.
Because integration is basically a integral of a small derivative right.
When you do integration of sine X X the X is a small region on which you are integrating.
So we now have when we have our differential for example a squared row equal to zero or something like
that.
Basically this is a differential equation which we are solving in a particular region.
So if you zoom in to this region what will happen is that I have set a boundary condition across the
edges.
Now the software will solve our differential equation in each domain.
And then give a solution which solution will be used to calculate the solution in other domain.
And so on.
Okay so this is how the software works.
Now define anti mesh.
The better result you can expect also depends on various other factors also which I would not cover
in this basic course but is how things work now in meshing.
You can choose user controlled machine also.
Now when I go to mash I go to modify and click on distribution.
You can explore other options also.
And I chose um edge.
Let's say I chose this edge.
Okay.
And I tell that I need 15 elements in this age.
And when I click on b all you see I have the region with a smaller mesh.
Now if I go to 50 you see it is more visible.
If I zoom in you see there are fifty elements in this age.
You can see that this region is having a greater element.
Now if you're working with an object for example you have a needle.
Okay.
One the one party circular and other side.
We have a pointy end.
No dissimilar this region where there is a slight edge.
We need to have a finer mesh.
Otherwise you will get errors because the sharper edge will be very sensitive to the boundary conditions.
Hence we need to create smaller mesh.
This is the basic principle of working with mesh.
Now I'll go to physics control fine below.
So this is totally cool.
Now okay so I hope that you have understood how mesh actually works.
So in my next video I'll explain you the how to add physics in a simulation.
Okay so just to recap we created a document.
We created a 3D component in it and then we created a geometry.
We need to tell the software what the software need to do.
So we have the software.
I am creating a geometry and I will solve the physics in this geometry.
We created a cylinder of radius one centimeter and height 10 centimeters.
We added a material of copper in the model and then we created a mesh.
Basically the software will solve the differential equations in this mass structure.
Okay so in my next lecture I will add the physics and I can explain how to add the boundary conditions.
Thank you.