tadd more geometrical parameters, resolve contact pressure - Granular.jl - Julia package for granular dynamics simulation
(HTM) git clone git://src.adamsgaard.dk/Granular.jl
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---
(DIR) commit 764bf1a96f0c1c5defe0afe0cc35c1db7f59eb07
(DIR) parent 1cc1237e7dd6b0a467dde033c5d324e4a47f75dd
(HTM) Author: Anders Damsgaard <andersd@riseup.net>
Date: Mon, 24 Apr 2017 13:38:10 -0400
add more geometrical parameters, resolve contact pressure
Diffstat:
M src/datatypes.jl | 8 ++++++--
M src/icefloe.jl | 25 ++++++++++++++++++++-----
M src/interaction.jl | 8 +++++++-
M src/io.jl | 9 +++++++--
4 files changed, 40 insertions(+), 10 deletions(-)
---
(DIR) diff --git a/src/datatypes.jl b/src/datatypes.jl
t@@ -12,7 +12,9 @@ type IceFloeCylindrical
thickness::float
contact_radius::float
areal_radius::float
- surface_area::float
+ circumreference::float
+ horizontal_surface_area::float
+ side_surface_area::float
volume::float
mass::float
moment_of_inertia::float
t@@ -54,7 +56,9 @@ type IceFloeArrays
thickness
contact_radius
areal_radius
- surface_area
+ circumreference
+ horizontal_surface_area
+ side_surface_area
volume
mass
moment_of_inertia
(DIR) diff --git a/src/icefloe.jl b/src/icefloe.jl
t@@ -70,7 +70,9 @@ function addIceFloeCylindrical(simulation::Simulation,
thickness,
contact_radius,
areal_radius,
- 1.0, # surface_area
+ 1.0, # circumreference
+ 1.0, # horizontal_surface_area
+ 1.0, # side_surface_area
1.0, # volume
1.0, # mass
1.0, # moment_of_inertia
t@@ -98,7 +100,9 @@ function addIceFloeCylindrical(simulation::Simulation,
)
# Overwrite previous placeholder values
- icefloe.surface_area = iceFloeSurfaceArea(icefloe)
+ icefloe.circumreference = iceFloeCircumreference(icefloe)
+ icefloe.horizontal_surface_area = iceFloeHorizontalSurfaceArea(icefloe)
+ icefloe.side_surface_area = iceFloeSideSurfaceArea(icefloe)
icefloe.volume = iceFloeVolume(icefloe)
icefloe.mass = iceFloeMass(icefloe)
icefloe.moment_of_inertia = iceFloeMomentOfInertia(icefloe)
t@@ -107,12 +111,20 @@ function addIceFloeCylindrical(simulation::Simulation,
addIceFloe!(simulation, icefloe, verbose)
end
-function iceFloeSurfaceArea(icefloe::IceFloeCylindrical)
+function iceFloeCircumreference(icefloe::IceFloeCylindrical)
+ return pi*icefloe.areal_radius*2.
+end
+
+function iceFloeHorizontalSurfaceArea(icefloe::IceFloeCylindrical)
return pi*icefloe.areal_radius^2.
end
+function iceFloeSideSurfaceArea(icefloe::IceFloeCylindrical)
+ return iceFloeCircumreference(icefloe)*icefloe.thickness
+end
+
function iceFloeVolume(icefloe::IceFloeCylindrical)
- return iceFloeSurfaceArea(icefloe)*icefloe.thickness
+ return iceFloeHorizontalSurfaceArea(icefloe)*icefloe.thickness
end
function iceFloeMass(icefloe::IceFloeCylindrical)
t@@ -166,7 +178,10 @@ function convertIceFloeDataToArrays(simulation::Simulation)
ifarr.thickness[i] = simulation.ice_floes[i].thickness
ifarr.contact_radius[i] = simulation.ice_floes[i].contact_radius
ifarr.areal_radius[i] = simulation.ice_floes[i].areal_radius
- ifarr.surface_area[i] = simulation.ice_floes[i].surface_area
+ ifarr.circumreference[i] = simulation.ice_floes[i].circumreference
+ ifarr.horizontal_surface_area[i] =
+ simulation.ice_floes[i].horizontal_surface_area
+ ifarr.side_surface_area[i] = simulation.ice_floes[i].side_surface_area
ifarr.volume[i] = simulation.ice_floes[i].volume
ifarr.mass[i] = simulation.ice_floes[i].mass
ifarr.moment_of_inertia[i] = simulation.ice_floes[i].moment_of_inertia
(DIR) diff --git a/src/interaction.jl b/src/interaction.jl
t@@ -15,7 +15,9 @@ function interact!(simulation::Simulation)
end
"""
-Resolve an grain-to-grain interaction using a prescibed contact law.
+Resolve an grain-to-grain interaction using a prescibed contact law. This
+function adds the compressive force of the interaction to the ice floe
+`pressure` field of mean compressive stress on the ice floe sides.
"""
function interactIceFloes!(simulation::Simulation,
i::Integer, j::Integer,
t@@ -37,6 +39,10 @@ function interactIceFloes!(simulation::Simulation,
simulation.ice_floes[i].force += force;
simulation.ice_floes[j].force -= force;
+ simulation.ice_floes[i].pressure +=
+ norm(force)/simulation.ice_floes[i].side_surface_area;
+ simulation.ice_floes[j].pressure +=
+ norm(force)/simulation.ice_floes[j].side_surface_area;
end
"""
(DIR) diff --git a/src/io.jl b/src/io.jl
t@@ -27,7 +27,12 @@ function writeVTK(simulation::Simulation;
"Diameter (contact) [m]")
WriteVTK.vtk_point_data(vtkfile, ifarr.areal_radius*2.,
"Diameter (areal) [m]")
- WriteVTK.vtk_point_data(vtkfile, ifarr.surface_area, "Surface area [m^2]")
+ WriteVTK.vtk_point_data(vtkfile, ifarr.circumreference,
+ "Circumreference [m]")
+ WriteVTK.vtk_point_data(vtkfile, ifarr.horizontal_surface_area,
+ "Horizontal surface area [m^2]")
+ WriteVTK.vtk_point_data(vtkfile, ifarr.side_surface_area,
+ "Side surface area [m^2]")
WriteVTK.vtk_point_data(vtkfile, ifarr.volume, "Volume [m^3]")
WriteVTK.vtk_point_data(vtkfile, ifarr.mass, "Mass [kg]")
WriteVTK.vtk_point_data(vtkfile, ifarr.moment_of_inertia,
t@@ -62,7 +67,7 @@ function writeVTK(simulation::Simulation;
"Contact friction (dynamic) [-]")
WriteVTK.vtk_point_data(vtkfile, ifarr.pressure,
- "Pressure [Pa]")
+ "Contact pressure [Pa]")
outfiles = WriteVTK.vtk_save(vtkfile)
if verbose