How to create a water tight mesh using Ball Pivot or any other in Open3D?

Dear All,
I have a set of 3D datapoints which looks similar to sphere. I want it to be converted to 3D mesh using python. I was researching and found Open3D library. I am very excited to work with this library.

Based on this, I tried to do surface reconstruction using Ball pivot algorithm and also Poisson surface reconstruction. I tried the same using Meshlab software. But, I am unable to do watertight mesh using Open3D.

I need water tight mesh since I want to work on further process using OpenFoam for simulation, based on this mesh.
I have attached the link of “.xyz” file along with this mail and also the mesh obtained from Meshlab. I would like to know how to work with Open3D to get such kind of surface reconstruction.

From Open3D I am getting meshing with gaps which is shown in the attached link.

[File link](https://drive.google.com/file/d/1dSJ5EdR_T4c2vvFOPtcH2FjE1aqnLhr7/view?usp=sharing)

[Mesh from Meshlab](https://drive.google.com/file/d/1q983ErlVUulF9h68UaYCBNB75mjiC-gM/view?usp=sharing)

[Open3D_mesh_obtained](https://drive.google.com/file/d/14BgJTiT-_wcIYiN1YAfU6lePgNxlelO7/view?usp=sharing)

Any leads will be appreciated.

Regards,
Sunag R A.