Wellcalc Questions

Below you'll find some FAQ's (frequently asked questions) about Wellcalc. If you have a question, please send a mail or submit the fill-in form on the service page .

 Can we use any material for the calculations?

 As long as you know the material data at certain temperatures you can expand the existing database with your own materials.

 Can we use any fluid for the calculations?

Yes, but only at fixed points of the proces. The calculations and simulations basic calculates with water, air or steam, but it is possible to fill in specific fluids at operating pressures and temperatures of the process.

  If we increase the thermowell length the forced bending stress decreases, why?.

 This might happen if you go above the frequency ratio of 1, but this is very dangerous because you pass the 0.8 ratio.

   What is the difference between forced bending and well bending in the software?

 Forced bending is bending caused by all forces on the thermowell and well bending is the bending of a horizontal mounted thermowell, caused by it's own weight.

   Is there any background information about the calculations?

 In the helpfile you can find a lot of information about the calculations and there formulas

   Does the program include a database for the steels?

Yes a database with approx 20 materials is included and updatable by the user

   How does the software handle the Strouhal problem with various Reynolds numbers?

There is a relation between surface roughness and Dragfactor as well as a relation between Dragfactor and Strouhal number. The software combines all these data and calculates the worsed case strouhal number at any flow velocity. In the results you find the Strouhal number and the engineer can interpretate the results for the construction.

   Are the calculations based on the ASME PTC of 1974?

Yes, the roots of the program have been based on these formulas, but have been improved by implementing Theoretical european formulas for natural frequencies in combination with practical data from USA sources. The accuracy of the calculations, the relation of material data to temperatures and the Strouhal calculations are more accurate and flexibel and suitable for more types of Thermowell constructions.

   Is it possible to run Wellcalc on Windows NT?

Yes, you can run it on Windows 95,98, ME and Windows NT,2000 platforms.