How to deal with small gap problem when extract model in Ansys

 The small gap you're encountering when extracting the internal volume in your pressure tank model with tubes is likely due to slight geometric imperfections or tolerances between the separate parts in your CAD software. Here are a few approaches you can try to fix this:

Can I Use Transition SST turbulence model for turbine or rotor in Ansys Fluent ?

 Yes, you can likely use the Transition SST model for your Darrieus turbine simulation in ANSYS FLUENT given the y+ wall value of approximately 1. Here's why:

Dynamic library error in OpenFoam. How to solve ?

 I'd be glad to help you with the dynamic library error you're encountering in your OpenFOAM simulation. While I cannot provide specific instructions on copying and pasting due to the potential variations in file structures and operating systems, here are general guidelines that should help you resolve the issue:

Abaqus is unable to locate a C++ compiler

 The error message indicates that Abaqus is unable to locate a compatible C++ compiler on your system. Here are some potential solutions that you can try:

 * Load vcvars64.bat: As suggested in the message, try loading the vcvars64.bat file before running Abaqus. This batch file sets up the environment variables for the Visual Studio C++ compiler. You can typically find it in the following location:

   C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars64.bat

The error message "Not enough constraints applied to prevent rigid body motion" in Ansys

 The error message "Not enough constraints applied to prevent rigid body motion" in Ansys Mechanical indicates that your PMSM rotor model is missing essential constraints to prevent it from undergoing unrealistic movements during the simulation. Here are some troubleshooting steps to address this:

Why I cannot apply a constant speed in the Harmonic Response? (Like the "rotational velocity" in the static structural analysis)

 In harmonic response analysis, applying a constant speed like in static structural analysis isn't possible because harmonic analysis focuses on the response of a system to varying excitation forces over a range of frequencies.

How to use timeVaryingMappedFixedValue in OpenFoam?

 The timeVaryingMappedFixedValue boundary condition in OpenFOAM allows you to prescribe values that vary in time and space on a patch. Here's a breakdown of its usage with the interFoam solver: