![]() ⚠️ ** Fallback** ⚠️ □️ Page Index for this GitHub Wiki and, hence, generates a more complex block geometry. (Here: SLOPE_OFF=50, BLOCK_BOT=0)Īdditionally increase BLOCK_BOT might place the sliding block partially on the plateu. ![]() At angles > 45° the resulting width is smaller. The effective width depends on the angle of the slope. horizontal resolution) defines the maximum width. Please note, that the width of the sliding body (i. The dimensions and the material of the sliding body are given as usual by the parameters OBJRESH horizontal resolution : 25 By doing so, we can easily define how deep below (or above) the water surface the sliding body initially is located. bathymetry) layer as the reference layer for the slope, but the last layer (here: water) as the reference layer for the slide body. Hint: When performing landslide simulations into water, it might be reasonable to select the first (bottom, i.e. A negative value indicates a slide body below the reference plane. Its default value is '0' which means that the sliding body is placed directly on top of the reference plane.Ī positive value for BLOCK_BOT shifts the slide body up (if possible, the body is always placed in a way that the lower right corner of the sliding block touches the slope). The distance between the bottom extent of the sliding body and the reference layer is defined by BLOCK_BOT Bottom position of slide body : 20 If not given, the same plane is used as for the slope. The material of the slope is (as usual) defined in the line LAY_MAT Layer material : slopeįor the sliding body we need to define a reference plane, too: BLOCK_LAY Reference layer for slide body : 1 the slope starts directly on the left side. ![]() The slope can be shifted horizontally SLOPE_OFF Slope offset : 20 The slope angle is defined by a double precision value SLOPE_ANG Slope angle : 45.D0Īnd is measured in degrees (0 75°, are recommended for experienced users only. The height of the slope is defined by SLOPE_H Height of slope : 50Īnd is measured in cells starting from the reference layer. If it is missing, the first (bottom) layer is used as the reference layer. The slope starts immediately on top of the reference layer. bottom part) we first need to define a reference layer: SLOPE_LAY Reference layer for slope : 1 To define the starting position of the slope (i. The meaning of these parameters is demonstrated in the figure below: These parameters can be used to define the shape of the sliding block and the slope. This routine requires additional parameters which need to be provided with the input-file (asteroid.inp): abbreviationĭistance between bottom of sliding block and reference layer (positive: block is above reference layer negative: block is below reference layer) This is done by the line S_TYPE Setup type : LANDSLIDEīy doing so, iSALE will switch from the default setup-procedure to a separate setup-routine specifically designed for landslide-scenarios. Now it is time for a closer look how the geometric bodies, such as the slope and the sliding block, are defined in First, we need to tell iSALE that we want to perform landslide simulations. 8The simulation will take a day or even longer*, so this should be run in the background./iSALE2D & Go to the relevant example directory cd /share/examples/landslide ![]() ![]() The thermodynamic behavior is calculated by a Tillotson equation of state for granite, too. For this purpose a Von Mises yield criterion is used. The slope has an angle of 45° and is composed of a strong material. To model a sand-like behavior of the sliding body, a Tillotson equation of state with parameters for granite is used and a Drucker-Prager strength model is applied with low cohesion (10 KPa) and a coefficient of internal friction of 0.4. The sliding block is represented by a triangular shaped object. Isale tillotson eos how to#It demonstrates how to use for landslide simulations (here: in two dimensions).īy turning off the cylindrical projection in 2D, CYL Cylind. This example shows the gravity-driven slide of a block along a slope into water and the generation of waves. ![]()
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