The Siemens Community Catalyst program was co-created with our community to acknowledge technology leaders who consistently contribute to the Siemens Community. Nominations are accepted on a rolling basis.
Hi everyone,
i have a question that: What is the difference between Niyama (or Micro porosity) and Porosity? And when should we use this value to change the design of the pattern? Thanks.
Hello,
Niyama is just the thermal gradient divided by the square root of the cooling rate, and it helps to detect micro porosity.
I attached a ppt where this is explained but basically the lower the niyama values (high cooling rate or low thermal gradient) the higher the possibility of micro porosity.
Remember that Niyama works under a certain range depending on the different materials.
This range is not necessary to know in Micro Porosity result. This result is based on dimensionless niyama so no range known is needed. This result is based on niyama and also in other parameters like pressure... (I attached a paper that talks about it)
Best Regards
Unable to find an attachment - read this blog
Hello Pau, Your document said that 'As the Niyama value decreases further, the amount of micro-shrinkage increases until it becomes detectable on a standard radiograph.'. So that, the Niyama criterion can detect the macro porosity too, right? If it is true, so why should we use the Porosity to define the area have macro porosity?
Join us for a community conversation on how High-Performance Computing (HPC) and Simcenter PSIM work together to meet the increasing demands of modern power electronics simulation. During this one-hour technical session, you'll discover how leveraging HPC can speed up simulations, improve scalability, and empower engineers…
Join us for a community conversation on accelerating your motor simulation workflow with Simcenter Simlab. In this beginner-friendly session, we'll introduce the platform's automated model-building capabilities and show how easy it is to set up your first electric motor analysis. You'll see the basic steps of geometry…
Join us for a Community Conversation where we'll discuss practical approaches to analyzing complex electromagnetic models using hybrid solver techniques. This session will provide a general overview of how different computational methods can be combined within a single simulation to address models containing varied…
