So, particularly for while we are studying aerodynamics, external flows or even internal flows or if you are studying any heat chamber or let's say conversion and conviction, those kind of stuff. So we how to create hollow persons inside our bodies. So let's see how we can do that. So for example, if I go to primitives and just taking a box which is one of them, so I'm just making it to find in three directions generated. So once you have done with that, go to tools here you can find enclosure, just select that. Here can get to seven everything can you to seven since our bodies Plan.

So, that is the encoder right. So, if we can subtract that inside one data we can create a hollow portion. So, now you can see two bodies. So, particularly while we are studying windy road enemies, so, the enclosure it will be act as a wind tunnel. So, from one side we can pause the aid and it is going to exit from another direction. So, in the middle we can take we can study the flow on the wing.

So, let's see. So, go to Boolean operations if you go to create there you can find a Boolean operations. So, target body should the target body should be our growth and total body should be our tool and here make sure select subtract right. So, generated now you can see inside our hollow portion has been created. So, that will be very useful. So, in this way we can reduce so many number of elements for the results will be very quick and very accurate and there is one more concept.

So, if you go to tools there is mid surface right select this face hold control select two phases apply gender dendrite So, so in this way you can To create a mid surface, so, we can convert the whole 3d body into 2d objects. So, let's say if we have 1000 elements, so, the elements is going to be reduced or to maybe just assume that can. So, in that case, we can reduce a lot of time. So, this is also very useful feature, particularly while we are doing computational fluid dynamics. So, these two will be very useful. All we are going to use these two features in the coming lectures while we are studying the winged aerodynamics or aerofoil aerodynamics, or even we can use for convergent divergent that's also So, In the next lecture, we'll see how we can convert our sketch into our surface.

So that is also very useful feature in the CFD