Hello everyone.

In my spare time I am working on this project:
I have a strip of conductive fabric that, bound around the place, gets hot when current flows.
In addition to the measurements you follow with instruments in the lab, I would like to try to simulate its behavior on LTSpice with the classic model I give below:


EDIT: There is a writing error .. Rse is the parasitic resistance between sensor (NTC) and environment .. and Rxe is the one between object (wirst) and environment

The pattern is correct right? Is there anything missing?
How do I choose parameter values highlighted in yellow:
1) Rxs
2) Rse
3) Cs
4) Cx

I attach NTCs that I am using.

 

Is there anything missing?

Where is the heated fabric? Shouldn't its thermal capacity, temperature and thermal resistance(s) to the environment be modelled?
Are the wrist and 'the object' the same thing?
Are the NTC and the sensor the same thing?
Does 'the environment' include the heated object?
Why is the 'resistance between NTC and environment' represented twice, with different values?

How do I choose parameter values highlighted in yellow

By guestimation, unless you have some actual values for reference.

 

Shouldn't its thermal capacity, temperature and thermal resistance(s) to the environment be modelled?

How? Experimentally what measurements should I make? Do I give it power and count in how many seconds it comes back to room temperature?

Are the wrist and 'the object' the same thing?

Yes

Are the NTC and the sensor the same thing?

Yes

Does 'the environment' include the heated object?

I don't know ... for simplicity no (?)

Why is the 'resistance between NTC and environment' represented twice, with different values?

You are right! There is a writing error
Rse is the parasitic resistance between sensor (NTC) and environment .. and Rxe is the one between object (wirst) and environment