File:Elmer-pump-heatequation.png - 维基百科,自由的百科全书

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摘要

Solution to the heat equation in a pump casing model using the finite elment modelling software Elmer. The mesh is intentionally quite coarse for presentation purposes. The equation solved is given by the following elmer input file. Geometery is distributed with elmer as pump_carter_sup.stp

Header   CHECK KEYWORDS Warn   Mesh DB "." "."   Include Path ""   Results Directory "" End  Simulation   Max Output Level = 4   Coordinate System = Cartesian   Coordinate Mapping(3) = 2 4 6   Simulation Type = Steady state   Steady State Max Iterations = 1   Output Intervals = 1   Timestepping Method = BDF   BDF Order = 1   Solver Input File = case.sif   Post File = case.ep End  Constants   Gravity(4) = 0 -1 0 9.82   Stefan Boltzmann = 5.67e-08   Permittivity of Vacuum = 8.8542e-12   Boltzmann Constant = 1.3807e-23   Unit Charge = 1.502e-19 End  Body 1   Target Bodies(1) = 1   Name = "Body Property 1"   Equation = 1   Material = 1   Body Force = 6 End  Solver 1   Equation = Heat Equation   Variable = -dofs 1 Temperature   Procedure = "HeatSolve" "HeatSolver"   Exec Solver = Always   Stabilize = True   Bubbles = False   Lumped Mass Matrix = False   Optimize Bandwidth = True   Steady State Convergence Tolerance = 1.0e-5   Nonlinear System Convergence Tolerance = 1.0e-8   Nonlinear System Max Iterations = 20   Nonlinear System Newton After Iterations = 3   Nonlinear System Newton After Tolerance = 1.0e-3   Nonlinear System Relaxation Factor = 1   Linear System Solver = Iterative   Linear System Iterative Method = BiCGStab   Linear System Max Iterations = 500   Linear System Convergence Tolerance = 1.0e-8   Linear System Preconditioning = ILU0   Linear System ILUT Tolerance = 1.0e-3   Linear System Abort Not Converged = False   Linear System Residual Output = 1   Linear System Precondition Recompute = 1 End  Equation 1   Name = "Equation 1"   Active Solvers(1) = 1 End  Material 1   Name = "Steel (alloy - generic)"   Poisson ratio = 0.285   Heat expansion Coefficient = 12.0e-6   Youngs modulus = 200.0e9   Heat Conductivity = 37.2   Sound speed = 5100.0   Heat Capacity = 976.0   Mesh Poisson ratio = 0.285   Density = 7850.0   Poisson ratio = 0.287   Youngs modulus = 200.0e9 End  Body Force 1   Name = "BodyForce 1"   Heat Source = 0.05 End  Boundary Condition 1   Target Boundaries(1) = 57   Name = "BoundaryCondition 1"   Temperature = 293 End 

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2010年6月2日 (三) 18:202010年6月2日 (三) 18:20版本的缩略图1,674 × 941(556 KB)User A1Solution to the heat equation in a pump casing model using the finite elment modelling software Elmer.

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