DOI: 10.18150/ikta9b
title: Numerical simulation of solidification process for biological colloids

description: Simulation SummaryThis file contains the results of transient simulations for copper inserts positioned at angles of 0° and 15°. The latest version of Ansys Fluent 2023 R2 was used throughout the study. The finite volume mesh was generated using Ansys Fluent Meshing with the following configuration:Mesh Generation Parameters:Local Sizing: NoSurface Mesh:Use Custom Size Field: NoMinimum Size: 0.01953125 mmMaximum Size: 0.5 mmGrowth Rate: 1.2Size Functions: Curvature & ProximityCurvature Normal Angle: 18°Cells Per Gap: 1Scope Proximity To: EdgesDraw Size Boxes: YesSeparate Out Boundary Zones by Angle: NoCreate Regions:Estimated Number of Fluid Regions: 2Add Boundary Layers:Enabled: YesOffset Method Type: Smooth-transitionNumber of Layers: 3Transition Ratio: 0.272Growth Rate: 1.2Apply To: Fluid regionsGrow On: Only wallsVolume Mesh Generation:Solver: FluentFill With: PolyhedraMesh Fluid Regions: YesMesh Solid Regions: YesSizing Method: GlobalGrowth Rate: 1.2Max Cell Length: 0.6640875 mmEnable Parallel Meshing: YesSimulation Setup:Solver Settings:Type: Pressure-BasedVelocity Formulation: AbsoluteTime: TransientGravity: Enabled (Y = 9.81 m/s²)Models Enabled:EnergySolidification and MeltingViscous: LaminarMaterials Used:From the Ansys material database:WaterCopper (wire)AirCustom material:PolystyreneDensity: 1050 kg/m³Specific Heat Capacity (Cp): 1100 J/kg·KThermal Conductivity: 0.12 W/m·KBoundary Conditions:Air region temperatures:Variant 1: -22°CVariant 2: -80°CSolution Methods:Gradient: Least Squares Cell BasedPressure: Second OrderMomentum: Second Order UpwindEnergy: Second Order UpwindPseudo Time Method: OffTransient Formulation: Second Order ImplicitWarped-Face Gradient Correction: EnabledInitialization:Initial domain temperature: 22°CCopper insert temperature: -80°CTime step: 0.0001 sNumber of time steps: Dependent on full solidification of fluidPost-Processing and Output:A cross-section was defined to monitor simulation results using two contours:Contour 1: TemperatureFilled, Node Values, Boundary Values, Global RangeVariable: Static TemperatureRange: 76 K – 296 KContour 2: Liquid FractionFilled, Node Values, Global RangeVariable: Solidification/Melting – Liquid FractionRange: 0 – 1Results were recorded as HSF animations every 100 time steps. Every 1000 frames from these animations were exported as JPEG imagesFile Structure and Content:Simulation results are organized in folders corresponding to inclination angles and ambient temperature conditions:Data catalog: 0_22_80Inclination angle: 0° (horizontal insert)Ambient temperature: –22 °CInitial insert temperature: –80 °CContents:liquid/ – sequence of images showing the phase change (solidification) of the insert over timetemp/ – sequence of images showing the temperature distribution over timeData catalog: 15_22_80Inclination angle: 15°Ambient temperature: –22 °CInitial insert temperature: –80 °CContents:liquid/ – solidification simulation framestemp/ – temperature evolution framesData catalog: 15_80 _80Inclination angle: 15°Ambient temperature: –80 °CInitial insert temperature: –80 °CContents:liquid/ – solidification simulation framestemp/ – temperature evolution frames