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The Objective of the study is to perform a CFD analysis of a Centrifugal Pump. The geometry for the analysis contains two different parts i.e. volute casing and impeller. The necessity of the work is to follow the recommended procedure for the analysis using turbomachinery module CFX under ANSYS Workbench.

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- 1. CFD Simulation of a Centrifugal Pump
- 2. Objective: The Objective of the study is to perform a CFD analysis of a Centrifugal Pump. The geometry for the analysis contains two different parts i.e. volute casing and impeller. The necessity of the work is to follow the recommended procedure for the analysis using turbomachinery module CFX under ANSYS Workbench. Geometry: Volute Impeller
- 3. Methodology Adopted: At the onset the Impeller blade is designed using Vista CPD followed by the generation of Volute casing using Blade Gen. Once the volute casing and impeller were designed separately, these parts were meshed using ANSYS workbench and Turbo Mesh module. A structured hexahedral mesh was generated on impeller blade while the volute casing was meshed using tetrahedral elements with fine inflation at the boundaries. In the next step both the meshed parts clubbed together and sent to CFX solver for setting up the boundary conditions. The problem was solved using CFX solver and the results were extracted using CFD Post-processing.
- 4. The following analysis sequence was used to perform the CFD analysis. Analysis Sequence: Impeller Blade design using Vista CPD Meshed using Turbo Grid Volute Casing Generation Meshed using ANSYS Meshing Solved in CFX Solver CFD Post Processing
- 5. Meshed Models: Volute Casing Impeller Blade Mesh Details: Volute Casing: Mesh Type: Tetrahedral Meshing: ANSYS Meshing Nodes: 65288 Elements: 193747 Impeller: Mesh Type: Structured Hexahedral Meshing: Turbo Grid Meshing Nodes: 31388 Elements: 25740
- 6. Boundary Conditions: Once the mesh was generated on Volute Casing and Impeller, these both parts were clubbed together in CFX by creating an interface between them. The following boundary conditions were applied for the analysis: Pressure Inlet: 1 atm. Turbulence Model: k-e Reference Pressure: 1 atm. Pressure Outlet: 0 atm. Impeller Rotation: 6000 rev./min. The Problem was solved for 500 number of iterations and then the results were extracted from CFD Post. Volute Casing along with Impeller
- 7. Results: Velocity Contour Pressure Contour
- 8. Results: Velocity Contour Pressure Contour
- 9. Results: Velocity Streamlines Velocity Vector
- 10. Conclusion: A sample CFD Simulation of a Centrifugal Pump is performed using CFX solver to validate the methodology recommended to solve the turbo machinery problems. Note: The Y+ value for the present simulation is 80, however for better results and accuracy Y+ value should be less than 30.