What is the Default Value of Radioss Input Cards?
Altair EmployeeAbstract
In this post, I explain the rule of Radioss default value of input cards.
Rules
No. 1: Blank → 0
When we create Radioss cards, we notice that there are many parameters which we do not input. Radioss treats those blanks as 0.
No.2: 0 → Default value
Radioss sets the parameters which we set to 0 or leave blank to a default value. For the parameters which we need real a value, Radioss treats them as 0.0.
Question: Can we set a parameters value to 0.0 when its default value is 1.0
Indeed, no, we can't. The smallest value which we can input is 1.0e-30, thus, we should input 1.0e-30 instead of 0.0.
For example, we cannot input n=0.0 for /MAT/LAW2. Instead, we input 1.0e-30,
How to check the value which Radioss sets?
Indeed, it is too difficult for us to estimate all default values from the reference guide. Thus, the simplest way is to run Starter with _0000.rad and to check _0000.out.
This is also helpful not only for checking default values, but also for checking whether your input is treated as expected.
Here is one example. There are many blanks,
For example, we can know C is set to 0.0 and εdot_0 is set to 1.0. Indeed, we can check all values.
