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Centrifugal pump | Workings Principle | Parts | Uses | Advantages & Disadvantage

Posted September 3, 2021 at 15:05 by Sanjv9473

What is a Centrifugal Pump ?
A Centrifugal pump is a rotoynamic pump which transfer liquids from suction to discharge by converting kinetic energy of liquids into potential energy.

Working Principle of Centrifugal pump

The working principle of Centrifugal pump is converting kinetic energy of liquids into potential energy to transfer liquids by imparting energy to the liquid by means of a centrifugal force developed by the rotation of an impeller that has several...
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checkMesh for a Hollow Cylinder

Posted August 9, 2021 at 21:23 by binyang

Create a hollow cylinder. Thanks.

Quote:
Originally Posted by zfaraday View Post
The error shown by checkMesh only means that you forgot to define the boundary faces in your blockMeshDict file. By the way, two questions.

First one, you forgot to define one of the arcs, well actually you have defined it in a wrong way. This is the arc going from point 15 to point 8 that you have defined it from 15 to 0.

Second question, why are you using such an amount of blocks to create a cylinder? You can do it
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Why COMSOL use FEM instead of FVM?

Posted July 8, 2021 at 12:49 by Trailokya

Quote:
Originally Posted by mprinkey View Post
FEM lacks a fundamental statement of conservation. FVM (and DG) are axiomatically conservative based on face flux integrals. FEM is defined as a minimization problem--find the solution that best reduces the Galerkin (or Least-Squares) residual of this system. For solid mechanics, that minimization statement makes a lot of sense--configuration of solid mechanical systems map nicely to variational formulations. Conservation equations, however, do not.

For simple flow physics, the
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A note for CFD developers and the Spalart-Allmaras model

Posted June 12, 2021 at 13:06 by sbaffini (NuTBox)
Updated June 15, 2021 at 07:00 by sbaffini

This is a pretty specific issue which relates to my experience working on wall functions and the Spalart-Allmaras model, but might be useful to others or, more importantly, the users of their code.

If you followed my previous posts here, you know I developed a wall function formulation based on the Musker wall function which, thanks to a math trick, is integrable also for arbitrary Pr/Pr_t (Sc/Sc_t) numbers and also for some forms of non equilibrium terms.

One of the...
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File Type: c sa_mu_t.c (2.1 KB, 132 views)
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OpenFOAM tips and tricks

Posted March 16, 2021 at 01:44 by sphani4391

I am sharing a few tips and tricks for better OpenFOAM simulations. These are not any new tips I discovered. These are just some which I felt most useful based on my experience.

1. Mesh is the most important aspect - I have spent countless hours fixing issues in other places while the real issue was with my mesh. As a thumb rule, make sure the mesh has: no non-orthogonality issues, low aspect ratio cells, no refinement zones in the region with high gradients

2. Always start...
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