Development of a 3-D Tree Thermal Response Model for Energy Budget and Scene Simulation Studies.
Abstract
Energy budget modeling of vegetated surfaces is complicated by the extreme variability that can be encountered in the species that are present. A three dimensional thermal model of trees is being developed to understand the thermal properties of trees. The model is being developed for leafed (Deciduous) and leafless conditions. Primitive solid distribution within each element is then established and material properties assigned. A finite difference calculation of the energy budget is performed in which tree elements are allowed to interact with one another as well as the outside environment. This report describes the development of a three dimensional thermal response model for individual trees. The model can be used for leafed and leafless trees. The thermal balance for woody materials is determined using a 3-heat conduction model for the tree components. The thermal balance of deciduous levels is calculated using an energy balance formulation that takes into account solar and infrared radiative interactions, free or forced convection, and evapotranspiration. Results of sensitivity calculations outlining the importance of various physical processes are given as well as comparisons against field test data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 1991
- Accession Number
- ADA240693
Entities
People
- David R. Longtin
- James R. Jones
- John R. Hummel
- Nanette L. Paul