Domain: Engineering — Energy Engineering
Target concept: Infrared camera detects the warm air plume rising from the heat source

Video generation prompt: A fixed infrared camera, several meters away, observes the warm air emitted by a small electric heater on a table in a still room.

Evaluation guide:
(i) Target concept: Thermal buoyancy-driven laminar plume visualization via infrared imaging
Minimum mechanism: Heater must emit sufficient IR radiation above ambient; air must be quiescent to prevent turbulent dispersion; infrared camera must be spectrally sensitive to mid-wave IR (3–5 μm) and display temperature differentials as luminance contrast
(ii)Storyline: [Phase 1] Static setup: fixed infrared camera views table-mounted heater in motionless environment → [Phase 2] Activation: heater powers on; no visible change except gradual thermal brightening at source → [Phase 3] Emergence: warm air plume appears exclusively at heater outlet surface → [Phase 4] Rise: plume ascends vertically in continuous, unbranched column with decreasing intensity upward → [Phase 5] Sustained coherence: plume maintains structural integrity and thermal contrast throughout, with no mixing, sinking, or lateral deviation. Perspective constraint: camera must maintain fixed viewpoint; visibility constraint: plume must be resolvable as distinct from background and heater surface, with no occlusion or glare masking its origin or trajectory.

Manual:
Experimental Procedure
1. Place a small electric heater on the center of a table in a still indoor room.
2. Position a fixed infrared camera several meters away, facing the heater directly.
3. Power on the heater and record for 10 seconds.
Observation of Experimental Phenomena
A warm air plume, rendered in thermal contrast (e.g., bright grayscale), rises vertically from the heater’s surface and remains coherent as it ascends into cooler ambient air.
Summary of Experimental Principles
Infrared cameras detect emitted infrared radiation; warm air from the heater has higher thermal energy and emits more IR than surrounding air, creating a visible plume in thermal imaging. In a still room, buoyancy drives laminar vertical rise due to density difference.

Prompt Grounding rubric:
level_1: No infrared camera appears in the scene; no electric heater is shown; there is no table; the room setting is missing; and no warm air plume of any kind is visible at any point in the clip.
level_2: An infrared camera appears but its position visibly changes or wanders; a heater appears but not resting on a table; a table appears with nothing on it; or a warm-air plume is missing entirely, or what's shown looks like ordinary white smoke or steam rather than a heat signature.
level_3: A fixed-looking infrared camera views a small electric heater sitting on a table; the room looks calm, with no curtains, papers, or other objects visibly moving from air currents; some kind of warm-air plume is present near the heater, but it doesn't stand out clearly from the surrounding background.
level_4: All the 3-point requirements are met, and further: the camera looks mounted and unmoving; the heater sits centered on a flat, level table surface; nothing in the room shows motion blur or drifting dust; the plume clearly originates from the heater's front or top surface and travels upward without drifting sideways.
level_5: All the 4-point requirements are met, and further: the camera keeps the same side-on or frontal view for the whole clip; the heater sits alone on a plain table with no other warm objects or obstructions nearby; the room stays completely still with no moving background elements; the plume rises only from the heater itself, travels straight upward in a continuous column, and stays visually distinct from the cooler background for the full duration.

Scientific and Causal Correctness rubric:
level_1: The rising air is shown as ordinary white or grey smoke/vapor rather than a heat signature; the heater itself shows no thermal glow; the plume drifts sideways or sinks instead of climbing; the plume appears before the heater is turned on, or lingers on screen after it's switched off; there's no visible reason to connect the heater to the plume at all.
level_2: The plume appears but is colored in a way that doesn't match thermal imaging (e.g., solid red, orange, or yellow rather than grayscale or an ironbow-style palette); it seems to come from the floor or ceiling rather than the heater; the heater itself looks thermally cold; or the plume immediately turns turbulent and choppy right at the source instead of rising smoothly.
level_3: The plume is shown using a thermal color scheme (grayscale or ironbow) and clearly originates at the heater's surface; it moves upward; the heater's heating element shows localized brightness consistent with warmth; nothing contradictory appears (no condensation droplets, no flame, no sparks); a viewer can reasonably infer the heater is causing the rising plume.
level_4: The plume uses a standard thermal palette, brightest near the heater and fading as it rises; it comes only from the heater's active heating surface, not its casing or power cord; the heater's heating element shows even warmth across its surface; the plume climbs in one continuous path without splitting into branches or veering sideways; nothing non-thermal (steam, dust, lens flare) is mixed into the shot.
level_5: Beyond everything required at score 4: the plume's brightness scales smoothly from hottest right at the heater outlet to coolest near the top of frame, entirely in grayscale; it comes only from the heater's operating surface, never from its base or cord; the heating element reads visibly brighter than the surrounding housing; the column rises unbroken and coherent from bottom to top with no visible confounders like moisture, particulates, or reflections.

Spatiotemporal Consistency rubric:
level_1: The camera's view suddenly jumps to a new angle or spins; the heater instantly appears in a different spot on the table; the plume pops into existence or vanishes with no transition; the room's lighting swings wildly from one frame to the next; the tabletop visibly warps or flickers; the heater changes size or shape partway through.
level_2: The camera view wobbles or slowly creeps rather than sitting still; the heater's position on the table shifts by more than its own width; the plume starts or ends with an abrupt cut rather than fading in or out naturally; the pattern of shadows around the heater or table shifts noticeably from one moment to the next; the edge of the table blinks in and out of view; the heater's brightness flickers for no thermal reason.
level_3: The camera holds one viewpoint with no panning, tilting, or zooming; the heater stays fully on the table without sliding or lifting off; the plume, once it appears, continues without cutting in and out; the direction and brightness of the light and shadows in the room stay the same from start to finish; the table keeps a consistent shape and nothing pops in or out of the frame unexpectedly.
level_4: The 3-point bar is fully met, and beyond that: the camera view shows no detectable drift over the whole clip; the heater stays centered on the table at the same orientation, fully visible throughout; the plume keeps one unbroken path rising from the heater to the top of frame; every shadow in the scene tracks consistently with a single, fixed light source; the table shows no warping, tearing, or flicker over time.
level_5: The 4-point bar is fully met, and beyond that: the camera's framing, focus, and lens characteristics stay identical frame to frame with no wobble or breathing; the heater occupies the same screen position, scale, and orientation throughout; the plume forms one continuous, gapless column from the heater to the top of the frame; the relative positions and proportions between heater, table, plume, and background stay consistent throughout; there are no jumps in geometry, lighting, or what's hidden versus visible from one frame to the next.