Critical heat flux and Leidenfrost temperature on hemispherical stainless steel surface

Illias, Suhaimi; Rosman, N.; Abdullah, Nooraihan; Hussain, S.; Baharudin, Mohamad Ezral; Idris, M.A.; Nizar, Ismail Khairul

doi:10.1016/j.csite.2019.100501

Cited by 11 publications

(9 citation statements)

References 17 publications

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“…(2) was used to theoretically predict the diameter based on the inner droplet dispenser diameter and liquid properties. From the calculation, the droplet diameter was approximately 3.628 mm which was similar with our previous report [15].…”

Section: Experimental Conditions and Related Formulasupporting

confidence: 89%

“…For easy understanding, if we can increase this Leidenfrost temperature in the boiling curve, it means that we can improve the cooling capabilities in thermal application system. A few number of researchers had conducted drop impact research [10][11][12][13][14] and Leidenfrost studies [15][16][17] in order to study this complicated phenomena. For instance, Illias et al [15] conducted an experimental work using hemispherical surface material made from stainless steel (304) to study the Leidenfrost temperature during liquid-solid contact.…”

Section: Introductionmentioning

confidence: 99%

“…A few number of researchers had conducted drop impact research [10][11][12][13][14] and Leidenfrost studies [15][16][17] in order to study this complicated phenomena. For instance, Illias et al [15] conducted an experimental work using hemispherical surface material made from stainless steel (304) to study the Leidenfrost temperature during liquid-solid contact. They found that the Leidenfrost temperature, for hemispherical stainless steel surface was approximately T L = 193.6 °C.…”

Section: Introductionmentioning

confidence: 99%

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Boiling Curve and Droplet Evaporation Lifetime on Hot Hemispherical Copper Surface

ROSMAN*,

ILLIAS,

HUSSAIN

et al. 2019

IJRTE

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The objective of this paper is to investigate the droplet evaporation lifetime and boiling curve on hot copper surface using ethanol liquid. We focus our study to find the Critical Heat Flux (CHF) and Leidenfrost temperature in the boiling curve. Copper material which has a high thermal conductivity, k was chosen as a test material. The copper material dimension was approximately 28.0 mm in height and 50.0 mm in diameter. The copper surface was modified into hemispherical surface in order to maximize the evaporation lifetime. The hemispherical surface was constructed using Electrical Discharge Machining (EDM). After completing the EDM process, the dimension of the hemispherical surface area was approximately 15.0 mm in depth and 30.0 mm in diameter. Meanwhile, ethanol liquid which has a low boiling point of 78 °C was chosen as a test fluid. The droplet diameter was approximately 3.628 mm. The impact height was set to be around 4.0 mm corresponding to drop impact velocity of 0.886 m/s. As a result, it was found that the critical heat flux (CHF) and Leidenfrost temperature range on hemispherical copper surface was approximately TCHF = 100.4-117.7 °C and TL = 170.0-175.8 °C, respectively.

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Section: Experimental Conditions and Related Formulasupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Boiling Curve and Droplet Evaporation Lifetime on Hot Hemispherical Copper Surface

ROSMAN*,

ILLIAS,

HUSSAIN

et al. 2019

IJRTE

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“…The data was recorded for six (6) times and the average reading was also calculated. The experimental apparatus is quite similar with our previous report [20][21][22].…”

Section: Experimental Apparatussupporting

confidence: 72%

“…They found that neither the existing capillary regime nor viscous regime identified for droplet impacts on impermeable surfaces (or a combination of these regimes) could describe β max for droplet impact on a porous surface over a wide range of We. Other researchers such as Illias et al [16][17][18][19][20][21], Rosman et al [22], Mitsutake et al [23], Tsuboyama et al [24] and Hasan et al [25][26] also conducted a few experimental works regarding droplet impact research in order to improve the understanding regarding the relationship between droplet impact and hot surfaces. In this paper, we focus our investigation in finding the Critical Heat Flux (CHF) by using three (3) different types of material.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Critical Heat Flux During Impact of a Droplet onto Hot Horizontal Surface

A¹

2020

IJETER

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The purpose of this research is to investigate the Critical Heat Flux (CHF) and its relationship with thermal inertia during impact of a droplet on hot horizontal surface. In the study, three (3) different types of material were used which were Aluminum, Brass and Stainless Steel (304). The materials dimension were 50.0 mm in diameter and 30.0 mm in height. The materials were polished until they became a mirror polished surface. Ethanol was used as the test liquid. The droplet diameter was approximately 3.528 mm. The impact height was approximately 65.0 mm corresponding to impact velocity of 1.129 m/s. The evaporation lifetime was measured in seconds by using a digital stopwatch. As a result, it was observed that the CHF occurred at the surface temperatures of 105, 120 and 160 °C for aluminum, brass and stainless steel, respectively. It was also observed that all CHF data showed an evaporation lifetime below 1 sec order which is similar with other literatures.

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Low thermal conductivity substrate accelerates droplet evaporation in transition boiling regime: An abnormal Leidenfrost phenomenon

Gong

et al. 2023

Applied Thermal Engineering

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Critical heat flux and Leidenfrost temperature on hemispherical stainless steel surface

Cited by 11 publications

References 17 publications

Boiling Curve and Droplet Evaporation Lifetime on Hot Hemispherical Copper Surface

Boiling Curve and Droplet Evaporation Lifetime on Hot Hemispherical Copper Surface

Experimental Investigation of Critical Heat Flux During Impact of a Droplet onto Hot Horizontal Surface

Low thermal conductivity substrate accelerates droplet evaporation in transition boiling regime: An abnormal Leidenfrost phenomenon

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