Welcome to the ERTH 353, Environmental Fluid Mechanics, public webpage for the Spring 2026 semester.
I will try to update this page every few days during the semester.

Waterfall at the Bellevue Downtown Park on 26 July 2025. Photo by Shane Mayor.

Spring 2026 Lectures: MWF, 1:00 - 1:50 PM.

Required book: None

Weds., 21 Jan., First day of the semester. Functions, independent and dependent variables.
Fri., 23 Jan., Ordinary (1 independent variable) versus partial derivatives (>1 independent variables)
Mon., 26 Jan., Partial derivatives, vectors, gradient, unit vectors, nabla
Weds., 28 Jan., Review for Friday's quiz: x, y, z, i, j, k, u, v, w, T, P, etc.
Fri., 30 Feb., Quiz #1. Then more on vectors and components. Then, continuum hypothesis and Knudsen number
Mon., 2 Feb., Flux-gradient relationships: Fourier's law of heat conduction, Fick's law of diffusion, and Newton's Law of viscosity
Weds., 4 Feb., Review for quiz. Then Couette flow, stress, surface forces on a fluid cube.
Fri., 6 Feb., Quiz #2: Newton’s 2nd law for a fluid parcel: body vs surface forces
Mon., 9 Feb., Derivation of the Cauchy momentum equation.
Weds., 11 Feb., Cauchy momentum equation in index notation; stress-tensor symmetry
Fri., 13 Feb.,
Mon., 16 Feb.,
Weds., 18 Feb.,
Fri., 20 Feb.,
Mon., 23 Feb.,
Weds., 25 Feb.,
Fri., 27 Feb.,
Mon., 2 Mar.,
Weds., 4 Mar.,
Fri., 6 Mar.,
Mon., 9 Mar.,
Weds., 11 Mar.,
Fri., 13 Mar.,
Mon., 16 Mar., Spring break. No classes.
Weds., 18 Mar., Spring break. No classes.
Fri., 20 Mar., Spring break. No classes.
Mon., 23 Mar.,
Weds., 25 Mar.,
Fri., 27 Mar.,
Mon., 30 Mar.,
Weds., 1 Apr.,
Fri., 3 Apr.,
Mon., 6 Apr.,
Weds., 8 Apr.,
Fri., 10 Apr.,
Mon., 13 Apr.,
Weds., 15 Apr.,
Fri., 17 Apr.,
Mon., 20 Apr.,
Weds., 22 Apr.,
Fri., 24 Apr.,
Mon., 27 Apr.,
Weds., 29 Apr.,
Fri., 1 May,
Mon., 4 May,
Weds., 6 May,
Fri., 8 May,
Weds., 11 May,

Dr. Mayor's page

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