CAE and CFD

Apply Fourier’s law to calculate one-dimensional conduction through a planar solid.

Select defensible thermophysical properties from material data for a stated temperature range.

Calculate the equivalent thermal resistance of a multilayer wall.

Calculate the temperature drop caused by thermal contact resistance.

Estimate spreading resistance from a small heat source into a larger plate using a supplied correlation.

Determine the Biot number for an electronics component or enclosure wall.

Assess whether a body can be represented by a lumped thermal-capacitance model.

Estimate warm-up time using the lumped-capacitance method.

Distinguish natural, forced, and mixed convection from the mechanism driving the flow.

Calculate convective heat transfer using Newton’s law of cooling.

Calculate the Reynolds number for an internal or external airflow.

Interpret the Prandtl number for air at electronics-cooling temperatures.

Calculate the Rayleigh number for a heated surface or enclosed air region.

Classify a natural-convection regime using Rayleigh number and geometry.

Estimate a natural-convection coefficient using an appropriate supplied correlation.

Explain how buoyant recirculation transports heat inside a sealed enclosure.

Interpret emissivity data for common electronics and enclosure surfaces.

Calculate radiation exchange between a small diffuse-gray surface and large surroundings.

Calculate a view factor for a simple enclosure geometry.

Calculate radiation exchange between two diffuse-gray surfaces using a supplied view factor.

Compare radiative and convective heat-transfer rates for an enclosure surface.

Determine when surface-to-surface radiation is appropriate for an electronics model.

Estimate how a change in surface emissivity affects enclosure temperature.

Formulate a conservation balance over a finite control volume.

Identify the physical terms in the continuity equation for enclosure airflow.

Identify the forces and transport terms in the momentum equation for buoyant airflow.

Identify the storage, convection, diffusion, and source terms in the energy equation.

Explain how the finite-volume method converts conservation equations into algebraic equations.

Compare first-order and second-order spatial discretization schemes.

Explain the purpose of pressure–velocity coupling in an incompressible flow solver.

Distinguish residual convergence, monitor convergence, verification, and validation.

Select a block, detailed, or compact thermal representation for an electronic component.

Convert a component heat-dissipation rate into consistent volumetric or surface heat-source inputs for the selected representation.

Calculate effective through-plane thermal conductivity for a layered PCB stack.

Estimate effective in-plane PCB conductivity from copper coverage.

Construct an orthotropic PCB conductivity definition from effective in-plane and through-plane values.

Represent a via array using an equivalent thermal-conductivity model.

Represent a thermal interface material or imperfect contact using an equivalent layer or thermal-contact resistance.

Estimate junction temperature using an applicable datasheet package metric while accounting for the non-transferability of θJA.

Translate a junction-to-ambient thermal path into solid and fluid simulation domains.

Choose between an external convection boundary condition and an explicitly modeled external-air domain.

Create simplified package, PCB, and enclosure bodies that preserve relevant dimensions and heat-flow paths.

Remove simulation-irrelevant geometric details without breaking important heat paths.

Repair gaps and overlaps that prevent creation of a watertight enclosure model.

Extract the sealed internal-air volume in Ansys geometry tools.

Create shared topology or explicit interfaces between contacting simulation domains.

Create named selections that support an auditable Fluent setup.

Identify regions where temperature or velocity gradients require mesh refinement.

Set global and local mesh sizes from geometric scales and expected gradients.

Resolve narrow air gaps without creating avoidable cell-quality problems.

Construct inflation layers for wall-bounded heat transfer.

Choose between conformal and non-conformal interfaces for adjacent zones.

Evaluate skewness, orthogonal quality, and aspect ratio against solver-appropriate criteria.

Correct a local mesh-quality problem using targeted geometry or sizing changes.

Design a three-level mesh-refinement study.

Select a pressure-based solver formulation for low-speed electronics cooling.

Choose between steady and transient formulations for a stated thermal objective.

Enable the energy model and gravitational acceleration with a consistent coordinate system.

Create fluid, isotropic-solid, and orthotropic PCB materials using temperature-appropriate properties.

Assign fluid zones, solid zones, and volumetric or surface heat sources.

Apply convection and ambient-radiation conditions to external enclosure walls while preserving the sealed internal-air domain.

Configure coupled heat transfer across solid–fluid and solid–solid interfaces, including any intentional contact resistance.

Create report definitions for key temperatures and heat-transfer rates.

Select between the Boussinesq and ideal-gas density models for a stated temperature range.

Set operating density, reference temperature, operating pressure, and gravity consistently for buoyant flow.

Select a laminar or turbulence treatment using Rayleigh number and enclosure geometry.

Configure the selected laminar or turbulence treatment for an enclosure calculation in Fluent.

Configure the surface-to-surface radiation model and surface emissivities.

Initialize and run the coupled model toward a stable baseline solution using physically reasonable initial values.

Diagnose a nonphysical buoyancy direction or temperature field from setup evidence.

Determine when an apparently unsteady buoyant flow requires transient simulation.

Diagnose solution convergence using residual histories and monitored physical quantities.

Correct a slow or divergent solution through controlled changes to numerical settings.

Verify global energy conservation in a converged enclosure model.

Demonstrate mesh independence using results from three systematically refined meshes.

Quantify result sensitivity to the selected spatial discretization scheme.

Compare predicted overall thermal resistance with a hand calculation or correlation.

Extract peak and area-weighted temperatures without introducing reporting artifacts.

Interpret temperature, heat-flux, velocity, and streamline plots to locate thermal bottlenecks.

Establish the baseline component thermal margins for a PCB in a sealed enclosure.

Evaluate how component placement changes the peak component temperature.

Evaluate how enclosure-wall thermal conductance changes junction-to-ambient performance.

Evaluate an internal heat spreader or chassis-conduction path as a design alternative.

Evaluate how enclosure-surface emissivity changes operating temperatures.

Perform a one-at-a-time sensitivity screen for selected uncertain power, contact, property, and ambient inputs.

Create a validation plan with measurable boundary conditions and temperature locations.

Produce an engineering recommendation using thermal margins, sensitivity and verification results, while stating validation needs and model limitations.