Asymmetric Cooling and Heating Perception

Hojatmadani, Mehdi; Reed, Kyle B.

doi:10.1007/978-3-319-93445-7_20

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…As presented in Table 1, thermal thresholds depend on the rate of change of the stimulation: higher rates of change result in faster detection and thus lower detection thresholds. In three studies [43], [44], [45], the authors make use of this phenomenon in the creation of a stimulus that is perceived as continously cooling, whereas actually the average temperature remains constant (see Table 6). They term this asymmetric cooling.…”

Section: Illusory Thermal Patternsmentioning

confidence: 99%

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Thermal Perception and Thermal Devices Used on Body Parts Other Than Hand or Face

Kappers

Plaisier

2019

IEEE Trans. Haptics

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Section: Illusory Thermal Patternsmentioning

confidence: 99%

“…Here, the cooling of the elements is so slow that is it below the perception threshold and thus only the heating stimulation is perceived. Both illusions were further investigated by Hojatmadani and Reed [45]. Among their findings was a counterintuitive effect that asymmetric heating was perceived as cooling.…”

Section: Illusory Thermal Patternsmentioning

confidence: 99%

Thermal Perception and Thermal Devices Used on Body Parts Other Than Hand or Face

Kappers

Plaisier

2019

IEEE Trans. Haptics

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“…Recently, applications of asymmetric heating and cooling processes have been found in the assessment of human thermal response. 23 Also, another application has been found in the selection of fabric to ensure maximum comfort and better management of heat transport pathways from the human body to the ambient media. 24 The effects of anisotropic, stratification of the media, and asymmetric heating and cooling on natural convection have been separately investigated previously by several researchers as seen in the literature mentioned above.…”

Section: Introductionmentioning

confidence: 99%

“…Assuming a non‐Darcian porous medium and an asymmetrically heated and cooled vertical channel, Zueco et al 22 presented a mathematical model for the unsteady coupled flow problem where the application in nuclear thermoconvection, cooling of electronic components, ocean thermal energy conversion could be found. Recently, applications of asymmetric heating and cooling processes have been found in the assessment of human thermal response 23 . Also, another application has been found in the selection of fabric to ensure maximum comfort and better management of heat transport pathways from the human body to the ambient media 24 …”

Section: Introductionmentioning

confidence: 99%

The role of stably stratified fluid and anisotropy porous medium in modeling fluid flow through an asymmetrically heated/cooled vertical annulus

2023

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In this article, the natural convection of stratified fluid driven by the asymmetric heating and cooling of the surfaces of the concentric cylinders filled with an anisotropic porous matrix is investigated. The stratified fluid is confined between the outer surface of the inner cylinder and the inner surface of the outer cylinder while the onset transient natural convection is induced by the asymmetric heat heating/cooling of the inner surface of the outer cylinder while the outer surface of the inner cylinder is maintained at a constant temperature T = 1 $T=1$. The present problem is governed by a pair of coupled second‐order partial differential equations. To obtain the expressions for the temperature and velocity fields, the coupled mathematical equations describing the problem are systematically uncoupled such that their original orders remain unaltered. The research established that if the temperature of the outer surface of the inner cylinder equals the temperature of the inner surface of the outer cylinder, a symmetric flow occurs where two maxima velocities are observed close to the surfaces Z = 1 $Z=1\phantom{\rule{}{0ex}}$ and λ $\lambda $ of the annulus, respectively. Furthermore, for some constraints on certain values of some physical quantities in the flow solutions, the present work excellently compares with the research conducted by Jha and Oni.

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“…The thermal modality of human sensation is susceptible to illusions, such as the phenomenon known as the thermal grill illusion [17], which refers to a sensation of heating or cooling that occurs in absence of any change in actual skin temperature. Research using this phenomenon include experiments conducted by Manasrah et al [18], Hojatmadani and Reed [19], and Oron-Gilad et al [20]. The latter used the thermal grill illusion in the efforts to develop the foundation for a tactile language [20].…”

Section: Introductionmentioning

confidence: 99%

Thermal Textile Pixels: The Characterisation of Temporal and Spatial Thermal Development

et al. 2019

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This study introduces the concept of a thermal textile pixel, a spatially and temporally defined textile structure that shows spatial and temporal thermal contrast and can be used in the context of thermal communication. A study was performed investigating (a) in-plane and (b) out-of-plane thermal signal behaviour for knitted structures made of three different fibre types; namely, polyamide, wool, and metal containing Shieldex yarn, and two different knitting structures: plain knit and terry knit. The model thermal source was a Peltier element. For (a), a thermography set-up was used to monitor the spatial development of thermal contrast, and for (b), an arrangement with thermocouple measuring temperature development over time. Results show that the use of conductive materials such as Shieldex is unnecessary for the plain knit if only heating is required, whereas such use significantly improves performance for the terry knit structures. The findings demonstrate that the textile pixel is able to spatially and temporally focus thermal signals, thereby making it viable for use as an interface for thermal communication devices. Having well-defined thermal textile pixels opens up potential for the development of matrices for more complex information conveyance.

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Asymmetric Cooling and Heating Perception

Cited by 8 publications

References 20 publications

Thermal Perception and Thermal Devices Used on Body Parts Other Than Hand or Face

Thermal Perception and Thermal Devices Used on Body Parts Other Than Hand or Face

The role of stably stratified fluid and anisotropy porous medium in modeling fluid flow through an asymmetrically heated/cooled vertical annulus

Thermal Textile Pixels: The Characterisation of Temporal and Spatial Thermal Development

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