Thermal Pipe Contact Model
Introduction
The thermal pipe contact model models a one-dimensional pipe with a thermal resistance per unit length of \(\eta\).
Formulation
The power in a thermal pipe model is updated by
where \(\Delta T\) is the temperature difference between the two reservoirs on each end of the pipe (i.e. the two contacting thermal pieces), and \(L\) is the length of the thermal contact.
Activity Criterion
A thermal pipe contact model is active if the host mechanical contact model is active.
Model Parameters
Properties
Keyword | Description | Symbol | Type | Range | Default | Modifiable | Inheritable |
---|---|---|---|---|---|---|---|
thermalpipe | Model name | ||||||
thres | Thermal resistance | \(\eta\) | FLT | \([0.0,+\infty)\) | 0.0 | YES | YES |
thexp | Thermal expansion coef. | \(\alpha\) | FLT | \([0.0,+\infty)\) | 0.0 | YES | NO |
temperature | Termperature | \(T\) | FLT | \(\mathbb{R}\) | 0.0 | YES | NO |
Property Inheritance
The thermal resistance can be inherited from the contacting thermal pieces, with:
where \((1)\) and \((2)\) denote the properties of piece 1 and 2, respectively. The inheritance flag for this property must be set to true, and at least one contacting pieces must hold a property with this name. If one of the pieces does not hold that property, then the contact thermal resistance is set equal to the value set in the other piece.
Methods
The thermal pipe contact model does not define any method.
Energies
The thermal pipe contact model does not define any energy.
Callback Events
The thermal pipe contact model does not define any callback event.
Was this helpful? ... | PFC 6.0 © 2019, Itasca | Updated: Nov 19, 2021 |