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--- tailorcrete:input_file_description [2012/06/21 12:43] – kolarfil
+++ tailorcrete:input_file_description [2012/08/01 10:37] – kolarfil
@@ Line 1: / Line 1: @@
-=== Input File Description ===
+==== Input File Description ====
 Here, general description of OOFEM input files for solving flow problems can be found. Fully general description of OOFEM input file (for all problems) can be found here: [[http://www.oofem.org|www.oofem.org]]
@@ Line 5: / Line 5: @@
 As a sample input file, input file for V-funnel simulation is choosen:
-{{:tailorcrete:vfunnel_tau60_mu20_beta0.2_oofem.in|}}
+{{:tailorcrete:vfunnel_tau40_mu20_beta0.2_oofem.in|}}
 In general, OOFEM input file can be (imaginary) divided into three main sections. In the first section specifications about type of problem under consideration, type of solver and exported variables are specified. In the second section there is a mesh descriptions. That means list of nodes with its numbers, coordinates and boundary conditions and list of elements specifying its type, numbers of connecting nodes, it's appropriate material and eventually its load. In the third section description of materials, boundary conditions and related entities is done.
-  * **First section**
+===First section===
  In first section (first seven lines), there is description of type of problem under consideration, type of solver and exported variables are specified.
@@ Line 44: / Line 46: @@
-  * ** Second section **
+===Second section ===
 In the second section mesh geometry is specified. In first line of second section (globally counting it is 8. line) number of mesh entities (elements, nodes...) and other items.
@@ Line 77: / Line 80: @@
 |  bodyloads  |  vector valued  |Represents body load acting to the element. First number determines number of columns, rest of the numbers represents corresponding type of body load (specified in third section)|
 |  boundaryLoads  |  vectro valued  | Represents load on the boundary on the element. The rules are the same as for bodyloads.|
+===Third section===
+In the third section, specification of **//crosssections, materials, boundary//** and **//initial conditions//** and **//loadtimefunctions//** is done.
+Since general description of these parameters is little bit complicated, we refer interested reader to [[http://www.oofem.org|www.oofem.org]] for further details. Here, only quick description of lines in presented file will be given.
+^  Entity  ^  parameters in presented file  ^  Description  ^
+|  emptycs  |  1  |Emptycs means "void crosssection". (it has no meaning in fluid dynamics, but it has to be specified)|
+|  twofluidmat  |  1 mat 2 2 3  |Twofluidmat is name of "master material" for two fluid flow. It coordinates compilation of diffusive temrs depending where the gausspoint is (concrete or air). Number "1" means that it is a first material. Parameter **//mat//** is a vector containing numbers of materials governed by twofluidmat (note, that the first number specifies number of columns). Here, Twofluidmat has two "slaves materials with numbers "2" and "3".|
+|  newtonianfluid  |  2 d 0.000001 mu 0.001  |Description of newtonian fluid. It is the second material, **//d//** is density, **//mu//** means viscosity.|
+|  binghamfluid2  |   3 d 0.0000023 mu0 0.02 tau0 0.04 muinf 0.001  |Description of Bingham fluid. It is the third material, **//d//** is for density, **//mu0//** is plastic viscosity and **//tau0//** is yield stress. **//muinf//** is some minimal value of mu due to numerical problems.|
+|  BoundaryCondition  |  1 loadtimefunction 1 prescribedvalue 0.0 valtype 5  | Description of first type of BC (Dirichlet BC). It uses loadtimefunction no. 1 and the prescribed value is 0.0. **//valtype//** is specification of physical meaning of BC. Number "5" means velocity.|
+|  Deadweight  |  3 components 2 0.0 -9810 loadTimeFunction 1 valtype 2  |This is type of body load. It is considered as a boundary condition, so it shares the numbering with previous item. It is the third BC. **//components//** is the body load vector with 2 components (x and z direction).|
+|  ConstantEdgeLoad  |  5 ndofs 2 loadtype 4 loadTimeFunction 1 components 2 0 0 properties 1 a 0.2  |This is specification of boundary load. Numbering is shared with all boundary conditions, this is fifth one. **//ndofs//** must be equal to the number of corresponding dofs, in this case it is 2 (components of velocity). **//loadtype//** specifies type of BC, for example flux, convection, etc. Number "4" means "Slip with friction" boundary condition. **//loadtimefunction//** and **//components//** are the same meaning like before. **//properties//** stores coefficient of friction, here it is equal 0.2|
+|  ConstantFunction  |  1 f(t) 1.0  | Specification od loadtime function. This is just constant function, sine there are BC's not depending on time. It is the first function with value equal to "1" |
+| UsrDefLTF  |  2 f(t) "1-(t>0.04)"  | User defined load time function. It is the second load time function. "1-(t>0.04)" means, that it is active for time greater than 0.04.|