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Hi everyone

I´m trying to create another equation of state model based on Bussinesq, but when i write "wmake" the next set of errors and warnings are printed in the terminal of OF4Win 20.09:

Can you please give me some help with this problem? Thanks in advance

I am using OpenFoam 20.9 for Windows 10.When i run the motorBike tutorial - no problem .If i use my own stl file which i have used many times on all OpenFoam platforms i get the error u will see in attached file. Once decomposePar has run going to snappyHexMesh those errors show. Also when simulation run the stl file lOpenFOAM for Windows 20.09 (v2)

🌪️ Centrifugal pump CFD, FEA & FSI Simulation 🌪️

Centrifugal Pump is the hidden workhorse of mankind 🚀. Pumps transport water everywhere where it is needed 💧, and water distribution networks represent one of the largest infrastructure assets of industrial society 🏗️.

The global pump market is expected to grow significantly in the coming years 📈, due to the increasing demand from various end-user sectors, especially the agriculture sector 🌾. According to a report by Fortune Business Insights, the global centrifugal pump market size was USD 29.24 billion in 2020 💰 and is projected to grow from USD 30.56 billion in 2021 to USD 45.56 billion by 2028 📊, exhibiting a CAGR of 5.9% during the forecast period from 2021–2028 📆. Another report by MarketsandMarkets estimates that the global centrifugal pump market will grow from USD 39.7 billion in 2023 to USD 51.5 billion by 2028 🌍, recording a CAGR of 5.4% during the forecast period.

The big issue is that most of the pumps are used in regimes that are far away from their best efficiency points 🤷‍♂️. In total, that leads to wasting huge amounts of electrical energy 💡 which is more than 90% of the total costs of pump ownership 💸. Take a look at how to make a comprehensive CFD, FEA & FSI Simulation of a centrifugal pump by TCAE, to optimize the centrifugal pump efficiency 🚀.

Full Case Study (download available):  🔗📚📥

https://www.cfdsupport.com/centrifugal-pump-cfd-fea-fsi-simulation.html

Hi everyone !

It's my first post here and I have a few questions on post-processing's manipulations and on variables' meaning :

1) How can I get the surface areas of the components' interfaces on TCAE (Paraview interface) or in the calculation case's folders ?

2) The TCAE user manual indicate that here are 2circumferential angles : the axial and the radial circumferential angles. To analyse my data, I need to extract the radial circumferential angle. However, withe the option 'calculateAngles on' in .../stationary/system/interfaces.fun, I only get one circumferential angle : circAng. How can I know which one is it (radial or axial) ? Or a mix of both ?

3) How is the mass flow rate calculated on the interfaces, with the absolute speed or with the flow speed (the radial speed for the mass flow at the outlet of a centrifugal impeller for example) ?

I hope someone will be able to help me on these topics... Thanks in advance !

Test topic 2 - will be removed soon.

In CFD we generally have a problem when we encounter something that is supposed to move on its "free will". One of these problems is an unknown rotation speed of a turbomachinery rotor. Common practice is that the user prescribes flow boundary conditions for one specific case or does a full spectrum of operational conditions including rotation speed. But what if he knows an input aerodynamic or shaft torque and wants to obtain a stable rotation speed (with no acceleration)?

One way is to use the TOPT algorithm where you look for a minimum of optimization function prescribed as (target_torque - calculated_torque)^2. 

First I calculated a torque for 187 RPM. Then I set this torque to our optimization function and ran TOPT with RPMs as a parameter.

Test topic - will be removed

Testing New Topic For Mail

Axial Turbine Stage - test topic. Axial Turbine Stage CFD. It is hard not to be emotional when seeing an axial turbine stage CFD. The axial turbine stage was our first big CFD project made here at CFDSUPPORT. In a way, it had preset our destiny - turbomachinery simulations. Here is a little example of how now, ten years later, TCAE runs the whole complex process in one command (or click). By TCFD: https://www.cfdsupport.com/axial-turbine-cfd-simulation.html

Test topic for email notification to support@cfdsupport.com, Comment Yes if you receive the email.

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Hello,

I would like to present my current project for further experiments with TCAE and TOPT.

It is a parametric axial fan created in the OpenVSP free parametric CAD primarily used for aviation purposes. It allows controlling the geometry with pre-programmed parameters and their further linking. It can also be controlled by external scripts. All these functions are perfect premises for geometry optimization with our TOPT module.

This model is designed for catalogue-like making of fans for defined conditions. You create a spectrum of axial fan variation and then choose which one suits the best (with consideration on parameters like pressure drop or aerodynamic torque and then fan efficiency calculated from them).

Simplified model will be used in the upcoming TCAE tutorial, where only a few basic blade parameters will be modified. Its main purpose there will be demonstration of the TOPT capabilities and their potential use in industrial design.