Category Archives: hydro

Hydraulic-hydrologic stuff

Wall effect on Lift and Drag Forces

A short discussion on lateral wall effect on Lift/Drag Forces on a rigid body in a flow. And a question, too. Based on my knowledge, forces on rigid bodies in a flow stream are given for an undefined flow field, … Continue reading

Posted in hydro, Matlab, numerical | 3 Comments

Glacier Bay Tidal Modeling

Researchers in the Department of Civil and Environmental Engineering at the Pennsylvania State University released their Glacier Bay project page, which an be found at http://www.engr.psu.edu/ce/hydro/hill/research/glba/default.stm. The modeling was done using ADCIRC. The project page is a good source of … Continue reading

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ETA atmospheric model

Eta Model is an atmospheric (meteorological forecasting) model developed in seventies and eighties years (by Mesinger & Janjic: Mesinger, F., and Z. I. Janjic, 1974: Noise due to time-dependent boundary conditions in limited area models. The GARP Programme on Numerical … Continue reading

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Navier-Stokes on matlab (reprise): ifiss 2.2

Follow this link to a useful (and free) matlab code that is basically a PDE solver adapted to common problems like diffusion, convection-diffusion, Stokes flow and Navier-Stokes flow problems (incompressible fluid dynamics). I am talking about ifiss2.2 or Incompressible Flow … Continue reading

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2-D unstructured mesh Matlab generator

MESH2D is a toolbox for the generation and manipulation of unstructured triangular meshes in MATLAB. High quality meshes can be generated automatically for user defined geometries. These meshes are suitable for subsequent Finite Element Method or Finite Volume Method analysis. … Continue reading

Posted in hydro, Matlab, numerical | 1 Comment

2-D Navier-Stokes equations Matlab solver

I am pretty sure that any hydraulic engineer wants to have a code for integrating Navier-Stokes equations over a complex domain. Fortunately there are some cool guys who share their work.This is what Navier-Stokes Solver (Navier2d) is: a Matlab solver … Continue reading

Posted in hydro, Matlab, numerical | 1 Comment

Wave Overtopping Manual

State of the art of studies on Wave Overtopping of Sea Defences and Related Structures is finally reported in a manual at http://www.overtopping-manual.com/index.html released in August 2007. This Overtopping Manual gives guidance on analysis and/or prediction of wave overtopping for … Continue reading

Posted in e-book, hydro, oceanography | 1 Comment

Smoothed Particle Hydrodynamics (SPH) in Fortran

Smoothed Particle Hydrodynamics (SPH) is a quite recent computational method developed to simulate fluid flows. Differently from other mathematical models of fluid dynamics, SPH describes the mean from the lagrangian point of view. This means that the fluid is divided … Continue reading

Posted in hydro, numerical, oceanography | 2 Comments

Confined seepage in Matlab

By using Partial Differential Equation Toolbox of Matlab language, I generated a simple problem of confined seepage. To use it save flow_v2.m (mouse right button and save destination as) open Matlab; type pdetool at the Matlab command line; open saved … Continue reading

Posted in hydro, Matlab, numerical | 5 Comments

Mathematical Modelling of Groundwater Flow (for Engineers)

A Canadian environmental engineer friend of mine asked me a consultancy on Groundwater Mathematical Modelling; water seepage through levees, in his case. I took this occasion for updating my personal list of softwares (free, partially free, and not free) that … Continue reading

Posted in hydro, Matlab, numerical | 1 Comment