ANSA -Surface wrap of Engine Assembly

AIM :

Make a Detailed Report on the Surfcae wrap of Engine assembly

Use the Batch mesh

Optimize the number of mesh elements

What is ANSA?

ANSA is an advanced multidisciplinary CAE pre-processing tool that provides all the necessary functionality for full-model build-up, from CAD data to ready-to-run solver input file, in a single integrated environment.

ANSA is the user's preference due to its wide range of features and tools that meet their needs. The list of productive and versatile features is long and the alternative tasks and processes to be completed using them are countless.

Mesh generation:

Mesh generation is the practice of creating a mesh, a subdivision of a continuous geometric space into discrete geometric and topological cells. Often these cells form a simplicial complex. Usually, the cells partition the geometric input domain. Mesh cells are used as discrete local approximations of the larger domain.

Purpose of meshing:

Meshes are used for rendering to a computer screen and for physical simulation such as finite element analysis or computational fluid dynamics.

Finite element calculations cannot be done directly on solid parts. We know to perform those calculations only on points creaThe finaly the mesh generation process. Thus generating mesh is a must and most important step for any CFD or FEA calculations to be performed.

Surface wrap:

The surface wrapper can be used to provide a closed, manifold, non-intersecting surface when starting from poor-quality CAD data. It is typically used when the imported surface includes problems such as:

The surface wrapper can achieve many different aims simultaneously when applied to such data.

Geometry clean up :

• Geomtrey cleanup has been done before moving on to the surface wrapping.
• since we are interested to do an external flow analysis we will have cleared all the errors before moving on to the surface wrapping.
• Common errors we have cleared in this geometry are filling the holes where ever is required.
• rectify the single coons errors by creating faces over there and also clear the errors by projecting the faces.
• Function that I used to clean up the outer surface of the geometry
• CONs > project to delete the unwanted faces.
• faces > create new face > cons or fitted or planar option based on the requirement to clear the error.
• Used the fill hole option to close all the unnecessary faces to create the watertight model.
• If we don't have a proper hot point to create a face we will have to create a hot point there to create hot points by using their reference we will have to project those hot points to the cons and Create a new face.

Surface wrap :

1 Transmission :

Load the geometry :

Initially load the geometry

Increase the resolution :

Once after loaded the geometry for the first step we will have to increase the resolution of the geometry to capture all the geometric properties

Cleanup the geometry on the external surface :

Since we are Considering external flow analysis we will have to clean up the geometry on the external surface

Delete the unnecessary faces :

Delete the unnecessary faces and using faces delete option

Create a new using the fitted option :

Creating a new face since we are performing surface wrap

We really dont need to keep open the outer surfaces we can use the fitted option and create a face over there.

GEARBOX :

Gearbox cleanup :

Load the geometry :

- initially, we will have to load the geometry

Fixed the unchecked unfaces :

-Fixed the unchecked faces by right-clicking the unchecked option and fix it

We don't have any errors :

Since we don't have errors on the external faces of the geometry we can save it and go for the further process to do the surface wrapping

Merging :

Merge the transmission to the gearbox :

Merge both the transmission and also the gearbox together and geometry'sy clcking on file > merge > select the geometry t merge with the current geometry

Merging :

select the merge with the other model selection and keep the remaining options as it is and click ok

Using STL mesh algorithm :

Using the STL meshing algorithm before moving to the wrapping

The purpose of creating meshing is to capture the geometrical features properly

After stl mesh :

This is how the geometry looks like after performing the stl mesh

Sizing of the stl mesh :

STL mesh parameters for this geometry have provided a maximum length of 6 and a minimum length of 1 after studying geometry I have fixed this target length.

More no of off elements :

We have more no of off elements Since we performed stl mesh algorithm

-The algorithm is used to capture the geometric feature properly

- this algorithm is not good for quality

Check quality criteria :

-We are enabling quality criteria by clicking the hidden function.

-Keep active only skewness

Improve the quality of the mesh :

To improve the quality of the geometry perform reconstruct ad click ok it is used to remove all the off elements

Fixed the target length :

in the below screenshot, we can clearly observe there is no off elements to show

Use the compression option and delete unspecified pids

sed the compression option to delete the unassigned pids

Wrap the model :

Create a wrap scenario in batch mesh and ciick on wrap scenario and click new

Cfd parameters :

assign the CFD parameters to enable the self-proximity and also the nearby component proximity

-enable the fill hole option and provide the diameter of the hole which will automatically fill the hole while performing the wrapping operation

Add contents or assign pids to perform wrap :

Add all the pids in contents to perform the wrap

-assigned pids will perform the wrap scenario

Completion of the surface wrap :

This is how the wrap scenario operation will look a like after running

The final step of the surface wrap :

If we want to see only wrapping

go to the model browser and enable only wrap

Google drive to the final model of the geometry :

https://drive.google.com/file/d/1nT2PP0rwpFZ-1_uyT8fPG6F5-CVxbyr5/view?usp=share_link