The discussion focuses on the behavior of heat flux in a simulation involving two concentric cylinders separated by an insulating material. The user is investigating how varying the thermal conductivity, denoted as kappa (κ), of the insulator affects heat flux. Despite changes in kappa, the heat flux remains constant, which raises questions about the underlying physics. The relevant equation discussed is j_q = -k(r) ∇·T, where j_q represents heat flux and T is temperature.
PREREQUISITESResearchers, engineers, and students in thermodynamics, particularly those working on heat transfer simulations and material properties in thermal systems.
What exactly is kappa, and what, more precisely, is the particular problem you are trying to solve? Also, documenting some of your analysis might be helpful.George444fg said:I am doing a project, actually it is a simulation. And we aim to determine the spatial and heat flux evolution of the system. The system consists of two concentric cylinders separated by an insulating material. I change the value of kappa of the insulator but the heat flux remains always the same, despite the change in the evolution of the temperature. Why this is happening?
Like I said, let's see what you did in detail.George444fg said:I mean it is the equation j_q=-k(r)\nabla \cdot T. I use the heat equation. The point being that no matter the values kappa gets the heat flux is always the same