3D flow output requests

This table list the available output result sets that you can request from the flow solver in Thermal/Flow, Electronic Systems Cooling, or Multiphysics.

Output request type	Result set in Post Processing Navigator	Description
Temperatures	Fluid Temperature — Element-Nodal	Temperature of the 3D fluid at the nodes for a given element.
Velocities	Velocity — Element-Nodal	Vector data equal to the conservative velocity at fluid nodes for a given element. Note: Because the software uses the control volume approach, the nodal velocity at the wall is not typically equal to zero.
Relative Velocity — Element-Nodal	Computed velocity in the rotating frame of reference. The relative velocity, Vrel, is related to the absolute velocity, Vabs, with the following equation:Vabs = Vrel + ωrwhere:ω is the angular velocity.r is the radius.This velocity is only available if you define Moving Frame of Reference simulation object of type Rotating Frame of Reference.	Vabs = Vrel + ωr				where:ω is the angular velocity.r is the radius.
Vabs = Vrel + ωr				where:ω is the angular velocity.r is the radius.
Velocities Adjusted	Adjusted Velocity — Element-Nodal	Vector data equal to the adjusted velocity at nodes for a given element. The adjusted velocity sets the velocity at the wall to zero.
Vorticity	Vorticity — Element-Nodal	Vector data equal to half the curl of the velocity field, , at fluid nodes for a given element.Vorticity is useful for visualizing vortices in turbulent transient flows.
Static and Total Pressures	Static Pressure — Element-Nodal	Fluid static pressure (gage pressure) at fluid nodes for a given element, expressed relative to ambient pressure.
Total Pressure — Element-Nodal	Fluid total pressure at fluid nodes for a given element, expressed relative to ambient pressure. The total pressure, Pt, is:Pt = Ps + (1/2)ρv2 for incompressible flowsPt = Ps·(1 + (γ-1)M2/2)γ/(γ-1) for compressible flowswhere:Ps is the static pressure.ρ is the density of the fluid.v is the velocity of the fluid.γ is the specific heat ratio.M is the Mach number of the flow (flow velocity / speed of sound).(1/2)ρv2 represents the dynamic pressure.	Pt = Ps + (1/2)ρv2 for incompressible flowsPt = Ps·(1 + (γ-1)M2/2)γ/(γ-1) for compressible flows				where:Ps is the static pressure.ρ is the density of the fluid.v is the velocity of the fluid.γ is the specific heat ratio.M is the Mach number of the flow (flow velocity / speed of sound).
Pt = Ps + (1/2)ρv2 for incompressible flowsPt = Ps·(1 + (γ-1)M2/2)γ/(γ-1) for compressible flows				where:Ps is the static pressure.ρ is the density of the fluid.v is the velocity of the fluid.γ is the specific heat ratio.M is the Mach number of the flow (flow velocity / speed of sound).
Local and Bulk Convection Coefficients	Local Convection Coefficient — Elemental	Convective heat transfer coefficient calculated between the temperature of the fluid elements and the temperature of the thermal elements that are in contact. This data is available only for those elements which convect to 3D fluid elements.
Bulk Convection Coefficient — Elemental	Convective heat transfer coefficient calculated between the temperature of the defined fluid ambient and the temperature of the thermal elements. This data is available only for those elements which convect to 3D fluid elements.Note: Negative values are obtained when the temperature of the wall is lower than the temperature of the flow.
Turbulence Model Quantities	Turbulence Energy — Element-Nodal	Turbulence kinetic energy at fluid nodes for a given element.This data is generated only when you use one of the following turbulence models: Standard K-Epsilon, RNG K-Epsilon, Realizable K-Epsilon, SST — Shear Stress Transport, or K-Omega (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Turbulence Dissipation — Element-Nodal	Dissipation rate, ε, of the turbulence kinetic energy at fluid nodes for a given element.This data is generated only when you use one of the following turbulence models: Standard K-Epsilon, RNG K-Epsilon, or Realizable K-Epsilon (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Turbulence Specific Dissipation — Element-Nodal	Specific dissipation rate, ω, of the turbulence kinetic energy at fluid nodes for a given element.This data is generated only when you use one of the following turbulence models: SST — Shear Stress Transport or K-Omega (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Turbulent Viscosity — Element-Nodal	Turbulent viscosity at fluid nodes for a given element.In RANS turbulence models, it is the proportionality constant between the Reynolds stress tensor and the strain rate tensor.In LES turbulence models, it approximates the portion of the Reynolds stress tensor which is associated with the unresolved scales of motion. Eddies of a length scale that is smaller than the local element length scale are considered unresolved scales of motion.This data is not generated for a laminar flow.
Turbulent Structures — Element-Nodal	The Q-invariant of the velocity gradient tensor that allows a detailed characterization of the dynamics, geometry, and topology of the flow. This data is available at fluid nodes for a given element.This data is not generated for a laminar flow.
Non-Newtonian Model Quantities	Shear Rate — Element-Nodal	Shear rate at fluid nodes for a given element when you use non-Newtonian fluids in your model.
Dynamic Viscosity — Element-Nodal	Dynamic viscosity at fluid nodes for a given element when you use non-Newtonian fluids in your model.
Fluid Densities	Fluid Density — Element-Nodal	Fluid density at fluid nodes for a given element. The solver uses the Ideal Gas Law to calculate the density when the fluid material has a gas constant defined. If the fluid material does not have a gas constant defined, then the density from the material definition is used directly.
Shear Stresses	Shear Stress on +ve Side — Nodal****Shear Stress on –ve Side — Nodal	Wall shear stresses on the flow surfaces.One data set is generated for each side of the flow surface that is adjacent to fluid elements.
Shear Rate — Element-Nodal	Shear rate at fluid nodes for a given element when you use Newtonian fluids in your model.
Roughness	Roughness on +ve Side — Nodal****Roughness on –ve Side — Nodal	Sand grain roughness height that you specify when you create a flow surface.One data set is generated for each side of the flow surface that is adjacent to fluid elements.
Y+	Y+ on +ve Side — Nodal	Y+ values on the flow surfaces. One data set is generated for each side of the flow surface which is in contact with fluid elements.
Y Plus — Element-Nodal	Y+ value at all fluid nodes for a given element in the flow domain.This data is generated only when you use one of the following turbulence models: Mixing Length, Standard K-Epsilon, RNG K-Epsilon, Realizable K-Epsilon, SST — Shear Stress Transport, K-Omega, or LES — Large Eddy Simulation (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Surface Pressures	Pressure on +ve Side — Nodal****Pressure on –ve Side — Nodal	Surface static pressures on the flow surfaces.One data set is generated for each side of the flow surface that is adjacent to fluid elements.
Total Pressure +ve Side — Nodal****Total Pressure –ve Side — Nodal	Surface total pressures on the flow surfaces. One data set is generated for each side of the flow surface that is adjacent to fluid elements when the CGNS check box is selected on the Optional Output Format page. Total pressure is equal to static pressure plus dynamic pressure. For the exact equations, see the Total Pressure — Element-Nodal description.
Mass Fluxes	Mass Flux — Nodal	Mass flux through flow type boundary conditions at fluid nodes.
Convective Fluxes	Convective Flux — Elemental	Heat flux convected through flow surfaces on the thermal model elements.
Humidity, Tracer Fluids, and Mixtures	Relative Humidity — Element-Nodal	Relative humidity expressed in percentage at fluid nodes for a given element.Note: Because the mist formation (fog) is not simulated in the fluid domain, the relative humidity value can be greater than 100% even if this is not physical. A value greater than 100% indicates that the saturation limit is exceeded and that phase change is happening in that region. Include the SOLVE EXTRA EQUATIONS TO MODEL FOG FORMATION advanced parameter in your solution to model fog formation.
Specific Humidity — Element-Nodal	Specific humidity at fluid nodes for a given element. This value is expressed in water-vapor-to-dry-air mass ratio, and gas-to-mixture mass fractions.
Tracer Fluid name — Element-Nodal	Mass fraction of the tracer fluid when a Tracer Fluid modeling object is present in a solution. The result node uses the Tracer Fluid modeling object name.
GasName[material ID]_M#G# — Element-Nodal	Mass fraction of each secondary gas in the homogeneous gas mixture. When a Homogeneous Gas Mixture modeling object is present in a solution, result nodes are generated for each species of the mixture except the primary gas. The result nodes are named GasName[material ID]_M#G# — Element-Nodal where:GasName is the name of the fluid material you set in the Fluid Material dialog box.M# represents the label of the Homogeneous Gas Mixture modeling object.G# represents the ID of the specific gas in the mixture, ranging from 2 to 5.
PMV (Predicted Mean Vote)	PMV — Element-Nodal	Value of the expected temperature sensation at fluid nodes for a given element. This value is based on the metabolic heat generation coupled with the thermal load on a body, which defines the difference between the internal heat production and the heat loss to the surrounding environment. This heat imbalance is then correlated to temperature sensation, which is the PMV index. To compute the PMV values, the solver uses:Simulation air temperature, velocity, and humidity results.Iterative computations for convective heat transfer coefficient and the clothing surface temperature based on the equations cited in ISO 7730:2005.Predefined values for metabolic rate (75 W/m2) and clothing insulation (0.09455 m2K/W). You can modify these values using METABOLIC_RATE_VALUE and CLOTHING_INSULATION_VALUE advanced parameters. For other values, see Metabolic rate and clothing insulation values.Note: You must model humidity to output this results set.
PPD (Predicted Percent Dissatisfied)	PPD — Element-Nodal	Predicted Percent Dissatisfied (PPD) value at fluid nodes for a given element. PPD is the correlation of the PMV and the people's response to such PMV. Hence, for different PMV values, a certain percentage of dissatisfied people are statistically found, this percentage is the PPD index.Note: You must model humidity to output this results set.
Mach Numbers	Mach Number — Element-Nodal	Velocity expressed as Mach numbers at fluid nodes for a given element.
Acoustic Power Density	Acoustic Power Density — Element-Nodal	Acoustic noise generated by the simulated turbulent flow at fluid nodes for a given element. Acoustic power density, AP, estimates the acoustic power of the isotropic turbulent motion of a fluid. The acoustic power density units are power / length3. The data generated is based on Lighthill's acoustic theory and uses the following analytical correlation developed by Proudman:where:ρ is the density of the fluid.ε is the turbulent dissipation rate.k is the turbulent kinetic energy.c is the speed of sound.This data is generated only when you use one of the following turbulence models: Standard K-Epsilon, RNG K-Epsilon, Realizable K-Epsilon, SST — Shear Stress Transport, or K-Omega (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).					where:ρ is the density of the fluid.ε is the turbulent dissipation rate.k is the turbulent kinetic energy.c is the speed of sound.
				where:ρ is the density of the fluid.ε is the turbulent dissipation rate.k is the turbulent kinetic energy.c is the speed of sound.
Pressure and Shear Resultants	Relative Pressure and Shear Resultant — Nodal	Relative pressure and shear resultant data represents the total force vector per unit area, , that the flow exerts on its boundary surfaces. The solver generates this data on the fluid boundary nodes.where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the relative pressure force per unit area. Its magnitude is equal to the relative pressure at the node, and its direction vector is the normalized sum of the relative pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.					where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the relative pressure force per unit area. Its magnitude is equal to the relative pressure at the node, and its direction vector is the normalized sum of the relative pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.
				where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the relative pressure force per unit area. Its magnitude is equal to the relative pressure at the node, and its direction vector is the normalized sum of the relative pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.
Absolute Pressure and Shear Resultant — Nodal	Absolute pressure and shear resultant data represents the total force vector per unit area, , that the flow exerts on its boundary surfaces. The solver generates this data on the fluid boundary nodes.where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the absolute pressure force per unit area. Its magnitude is equal to the absolute pressure at the node, and its direction vector is the normalized sum of the absolute pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.					where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the absolute pressure force per unit area. Its magnitude is equal to the absolute pressure at the node, and its direction vector is the normalized sum of the absolute pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.
				where: is the total fluid stress tensor. is the boundary unit normal vector pointing out of the flow domain. is the direction vector for the viscous force. is the absolute pressure force per unit area. Its magnitude is equal to the absolute pressure at the node, and its direction vector is the normalized sum of the absolute pressure vectors on the faces touching the node. is the viscous force per unit area. Its magnitude is equal to the average shear of the faces touching the node, and its direction vector is the normalized velocity vector at the node.
Condensation/Evaporation	Film Thickness — Elemental	Accumulated water film thickness.
Water Cumulation — Elemental	Water cumulation in units of mass over area.
Residuals	Momentum Residual — Element-Nodal	Flow residual of the momentum equations at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme.
Mass Residual — Element-Nodal	Flow residual of the mass equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme.
Energy Residual — Element-Nodal	Flow residual of the energy equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme and the energy equation is solved.
Turbulence Energy Residual — Element-Nodal	Flow residual of the turbulence kinetic energy equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme and the turbulence equations are solved.
Turbulence Dissipation Residual — Element-Nodal	Flow residual of the dissipation rate, ε, of the turbulence kinetic energy equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme and when you use one of the following turbulence models: Standard K-Epsilon, RNG K-Epsilon, or Realizable K-Epsilon (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Turbulence Specific Dissipation Residual — Element-Nodal	Flow residual of the specific dissipation rate, ω, of the turbulence kinetic energy equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme and when you use one of the following turbulence models: SST — Shear Stress Transport or K-Omega (Solution dialog box→Solution Details page→Flow Control group→Turbulence Model list).
Humidity Residual — Element-Nodal	Flow residual of the humidity equation at the nodes for a given element.This data is generated only when you use the fully coupled pressure-velocity scheme and humidity equation is solved.
Tracer Fluid name Residual — Element-Nodal	Flow residual of the scalar equation for the tracer fluid when a Tracer Fluid modeling object is present in a solution. The result node uses the Tracer Fluid modeling object name.This data is generated only when you use the fully coupled pressure-velocity scheme and tracer fluid equations are solved.
GasName[material ID]_M#G# Residual — Element-Nodal	Flow residual of the scalar equation for each secondary gas in the homogeneous gas mixture at the nodes for a given element. When a Homogeneous Gas Mixture modeling object is present in a solution, result nodes are generated for each species of the mixture except the primary gas. The result nodes are named GasName[material ID]_M#G# Residual — Element-Nodal where:GasName is the name of the fluid material you set in the Fluid Material dialog box.M# represents the label of the Homogeneous Gas Mixture modeling object.G# represents the ID of the specific gas in the mixture, ranging from 2 to 5.This data is generated only when you use the fully coupled pressure-velocity scheme and gas mixture equations are solved.

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