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The macros listed in Table 3.2.20- 3.2.23 can be used to return real face variables in SI units. They are identified by the F_ prefix. Note that these variables are available only in the pressure-based solver. In addition, quantities that are returned are available only if the corresponding physical model is active. For example, species mass fraction is available only if species transport has been enabled in the Species Model dialog box in ANSYS FLUENT. Definitions for these macros can be found in the referenced header files (e.g., mem.h).
Face Centroid (
F_CENTROID)
The macro listed in Table 3.2.20 can be used to obtain the real centroid of a face. F_CENTROID finds the coordinate position of the centroid of the face f and stores the coordinates in the x array. Note that the x array is always one-dimensional, but it can be x[2] or x[3] depending on whether you are using the 2D or 3D solver.
The ND_ND macro returns 2 or 3 in 2D and 3D cases, respectively, as defined in Section 3.4.2. Section 2.3.15 contains an example of F_CENTROID usage.
Face Area Vector (
F_AREA)
F_AREA can be used to return the real face area vector (or `face area normal') of a given face f in a face thread t. See Section 2.7.3 for an example UDF that utilizes F_AREA.
By convention in ANSYS FLUENT, boundary face area normals always point out of the domain. ANSYS FLUENT determines the direction of the face area normals for interior faces by applying the right hand rule to the nodes on a face, in order of increasing node number. This is shown in Figure 3.2.1.
ANSYS FLUENT assigns adjacent cells to an interior face ( c0 and c1) according to the following convention: the cell out of which a face area normal is pointing is designated as cell C0, while the cell in to which a face area normal is pointing is cell c1 (Figure 3.2.1). In other words, face area normals always point from cell c0 to cell c1.
Flow Variable Macros for Boundary Faces
The macros listed in Table 3.2.22 access flow variables at a boundary face.
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Lossless Scaling’s flagship feature is its proprietary LSFG (Lossless Scaling Frame Generation) technology. LSFG uses a machine‑learning model to interpolate additional frames between the ones your game actually renders. With multipliers of x2, x3, and x4, you can transform a 30 FPS experience into a fluid 60, 90, or even 120 FPS.
Getting the portable version running takes less than two minutes. 1. Prepare Your Game Launch your game. Go to the in-game graphics settings.
OFF (prioritize raw GPU rendering power over frame generation overhead) For Retro and Emulated Games
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Select LS1 (for modern games), AMD FSR (for sharpness), or Integer Scaling (for pixel art). Enable Frame Generation (LSFG 2.0): Toggle LSFG to on. Set Mode: Choose Auto .
Lossless Scaling v2.8.1 includes a robust suite of spatial upscaling tools:
: Your game must be in Windowed or Borderless Windowed mode.
The software was rebuilding the scene in 3D space. It was using light ray tracing to calculate what the camera couldn't see. : The portable nature means you can carry
: This version features improved Frame Generation (LSFG), which significantly reduces visual artifacts during fast movement.
Use 2x or 3x depending on your baseline FPS.
Traditional upscaling stretches a low-resolution image to fill a large screen, causing blurriness. Lossless Scaling bypasses the default Windows display manager to apply integer scaling or spatial upscaling directly to the game window. Spatial Upscaling vs. Frame Generation
In the original tape, she was a smudge. A ghost. In the v281 render, she stopped. She turned. With multipliers of x2, x3, and x4, you
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: Add the images you wish to scale.
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See Section 2.7.3 for an example UDF that utilizes some of these macros.
Flow Variable Macros at Interior and Boundary Faces
The macros listed in Table 3.2.23 access flow variables at interior faces and boundary faces.
F_FLUX can be used to return the real scalar mass flow rate through a given face f in a face thread t. The sign of F_FLUX that is computed by the ANSYS FLUENT solver is positive if the flow direction is the same as the face area normal direction (as determined by F_AREA - see Section 3.2.4), and is negative if the flow direction and the face area normal directions are opposite. In other words, the flux is positive if the flow is out of the domain, and is negative if the flow is in to the domain.
Note that the sign of the flux that is computed by the solver is opposite to that which is reported in the ANSYS FLUENT GUI (e.g., the Flux Reports dialog box).
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3.2.3 Cell Macros
