Palestra: O Problema de Múltipla Escala Aplicado ao Sistema de Fluxos de Água e Calor na Subsuperfície do Solo

15 em 15: Ciência e Cultura na Física

O Problema de Múltipla Escala Aplicado ao Sistema de Fluxos de Água e Calor na Subsuperfície do Solo

Palestrante: Profa. Assoc. Dra. Rosangela Sviercoski

Afiliação: Institute of Oceanology - Bulgarian Academy of Sciences - Varna - Bulgaria

Data: 19/02/2019 - Terça-feira

Horário: 10:00 horas

Local: Anfiteatro I (prédio novo) do Instituto de Física - UFG

ABSTRACT

Models that predict the simultaneous movement of liquid water, vapor and heat in the shallow subsurface has many practical interests, given the critical role these processes play in the global water and energy balances. Given the limitation in computational capabilities, important details describing the interaction between heat and water near the subsurface, including the type of soil and its spatial heterogeneity, is a big challenge to be accounted for in current global climate models.

In this talk, I will present a mathematical homogenization procedure that applies the two-scale formulation and asymptotic analysis into elliptic operators, and in particular, into the non-linear coupled system that describes the interaction between water and heat near the soil surface. The resulting 3D-upscaled (homogenized) model uses parameters such as air temperature, solar radiation, among others, as boundary conditions, making it more realistic and ready for coupling with the atmosphere. The use of such upscaled model allows a more accurate prediction of evaporation and water's budget to be used into large scale climate modeling efforts to better quantify the change of the climate, its forecast and its impact.