ESS228
Prof. Jin-Yi Yu
q Momentum Equations
qContinuity Equation
η
h
Boussinesq Approximation
(for the lower layer)
(for the lower layer)
•Boussinesq
approx: replace the ratio (r1/r2) by unity
in the momentum equation.
•We
keep the density difference in this g′ term, because it involves density difference
(ρ1-
ρ2)/
ρ1*g,
which is related to the buoyancy force.
