Soil Thermal Regime - Soil Physics - Lecture Slides, Slides of Soil Physics

Download Soil Thermal Regime - Soil Physics - Lecture Slides and more Slides Soil Physics in PDF only on Docsity! Outline • Announcements • Soil Thermal Regime • Ice (courtesy of Yuki & Ranae) docsity.com Quiz, question 1: A 2nd-order partial differential equation has appeared in various forms in recent lectures. Only a few variables, and the proportionality coefficient, differ from one form to another. Write one form of this equation as we have used it. ( )     ∂ ∂ ∂ ∂− = ∂ ∂ z D zt θθθ Hydraulic diffusion 2 2 z CD t C ∂ ∂ −= ∂ ∂ Molecular diffusion 2 2 z TD t T T ∂ ∂ −= ∂ ∂Thermal diffusion (heat flow) docsity.com Quiz, question 2: Gradient of What? What Moves? Name of the Proportionality Coefficient What is Conserved (Transient Form)? Darcy’s Law Water Potential Water Fick’s Law Concen- tration Molecules Fourier’s Law Tempera- ture Heat Extra credit: Ohm’s Law Electrical Potential Current (electrons) 2 2 z TD t T T ∂ ∂ −= ∂ ∂ docsity.com Quiz, question 2: Gradient of What? What Moves? Name of the Proportionality Coefficient What is Conserved (Transient Form)? Darcy’s Law Water Potential Water Hydraulic Conductivity (or diffusivity) Fick’s Law Concen- tration Molecules Molecular Diffusivity Fourier’s Law Tempera- ture Heat Thermal Diffusivity Extra credit: Ohm’s Law Electrical Potential Current (electrons) Electrical Conductivity 2 2 z TD t T T ∂ ∂ −= ∂ ∂ docsity.com Quiz, question 2: Gradient of What? What Moves? Name of the Proportionality Coefficient What is Conserved (Transient Form)? Darcy’s Law Water Potential Water Hydraulic Conductivity Water (volume) Fick’s Law Concen- tration Molecules Molecular Diffusivity Mass (molecules) Fourier’s Law Tempera- ture Heat Thermal Diffusivity Energy (heat) Extra credit: Ohm’s Law Electrical Potential Current (electrons) Electrical Conductivity Charge (electrons) 2 2 z TD t T T ∂ ∂ −= ∂ ∂ docsity.com