Temperature Boundary Condition

Unit: [Θ]

A temperature boundary condition applies a predefined temperature to a node. Instead of calculating temperature as a simulation result, at these nodes the temperature is given by the boundary condition value. This can lead to an inflow of energy into the model when neighboring nodes have a lower temperature or to an outflow from the model when there is a temperature gradient from the neighboring nodes towards the boundary condition.

Temperature boundary conditions are applied in cases where the temperature in groundwater is known in advance. This can be the case for example for fixing the undisturbed ground temperature around a model for the local influence of a ground-source heat exchanger.