Pub Date : 1982-07-01DOI: 10.1016/0094-4548(82)90038-8
R.L. Baker
An analytic solution is presented for the steady-state moving boundary melt layer problem with volumetric energy absorption. Energy balances across the melt layer and the liquid-solid interface show the relative contributions of absorption, conduction, and phase change energy transfer and allow the melt layer thickness to be determined. Due to the vaporization (ablation) of material from the melt layer surface, the temperature profiles exhibit a maximum value within the melt layer. The temperature profiles and melt layer thickness are shown to be functions of the spectral absorptivity, the thermal diffusivity, and the surface recession rate. These variables occur together in a dimensionless group.
{"title":"A steady-state melt layer model with absorption, conduction, and surface vaporization","authors":"R.L. Baker","doi":"10.1016/0094-4548(82)90038-8","DOIUrl":"10.1016/0094-4548(82)90038-8","url":null,"abstract":"<div><p>An analytic solution is presented for the steady-state moving boundary melt layer problem with volumetric energy absorption. Energy balances across the melt layer and the liquid-solid interface show the relative contributions of absorption, conduction, and phase change energy transfer and allow the melt layer thickness to be determined. Due to the vaporization (ablation) of material from the melt layer surface, the temperature profiles exhibit a maximum value within the melt layer. The temperature profiles and melt layer thickness are shown to be functions of the spectral absorptivity, the thermal diffusivity, and the surface recession rate. These variables occur together in a dimensionless group.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 4","pages":"Pages 299-308"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90038-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89904904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-07-01DOI: 10.1016/0094-4548(82)90036-4
Viswanath Subramanian, Raman Ganesh
The entertainment by a particle laden concentric jet is theoretically determined and compared with direct measurements. Particles enhance the mixing.
从理论上确定了载有粒子的同心射流的娱乐，并与直接测量结果进行了比较。颗粒增强了混合。
{"title":"Entertainment by a concentric jet with particles in the primary stream","authors":"Viswanath Subramanian, Raman Ganesh","doi":"10.1016/0094-4548(82)90036-4","DOIUrl":"10.1016/0094-4548(82)90036-4","url":null,"abstract":"<div><p>The entertainment by a particle laden concentric jet is theoretically determined and compared with direct measurements. Particles enhance the mixing.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 4","pages":"Pages 277-290"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90036-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79096571","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-07-01DOI: 10.1016/0094-4548(82)90039-X
A. Raptis, I. Pop
An analysis of a steady two-dimensional flow of water at 4°C through a saturated porous medium bounded by a vertical, infinite and permeable plate is presented on the basis of generalized Darcy's law. Expression for the velocity and temperature fields as well as for the rate of heat transfer on the plate are obtained. Effects of Grashof number and permeability parameter on the flow characteristics are graphically presented and discussed.
{"title":"Combined convection flow of water at 4°C through a porous medium bounded by a vertical surface","authors":"A. Raptis, I. Pop","doi":"10.1016/0094-4548(82)90039-X","DOIUrl":"10.1016/0094-4548(82)90039-X","url":null,"abstract":"<div><p>An analysis of a steady two-dimensional flow of water at 4°C through a saturated porous medium bounded by a vertical, infinite and permeable plate is presented on the basis of generalized Darcy's law. Expression for the velocity and temperature fields as well as for the rate of heat transfer on the plate are obtained. Effects of Grashof number and permeability parameter on the flow characteristics are graphically presented and discussed.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 4","pages":"Pages 309-318"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90039-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81089720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-07-01DOI: 10.1016/0094-4548(82)90031-5
S.D. Petridis, A.J. Addlesee
Experiments were performed to determine the heat transfer characteristics of a turbulent pipe flow downstream of a flow control orifice. The orifice consisted of an orifice plate followed by an abrupt expansion. A total of fifty-four geometric variants were tested. The working fluid was water, with Prandtl number 7, and the Reynolds number range was from 50, 000 to 125, 000. The maximum Nusselt numbers observed were 3 to 5 times the value for the corresponding fully-developed flows.
{"title":"Local heat transfer downstream of a two-element flow control orifice","authors":"S.D. Petridis, A.J. Addlesee","doi":"10.1016/0094-4548(82)90031-5","DOIUrl":"10.1016/0094-4548(82)90031-5","url":null,"abstract":"<div><p>Experiments were performed to determine the heat transfer characteristics of a turbulent pipe flow downstream of a flow control orifice. The orifice consisted of an orifice plate followed by an abrupt expansion. A total of fifty-four geometric variants were tested. The working fluid was water, with Prandtl number 7, and the Reynolds number range was from 50, 000 to 125, 000. The maximum Nusselt numbers observed were 3 to 5 times the value for the corresponding fully-developed flows.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 4","pages":"Pages 231-236"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90031-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82379419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90061-3
J.P. Gupta, A. Sharma, D. Garg
{"title":"Further experiments of transient swelling during pool boiling","authors":"J.P. Gupta, A. Sharma, D. Garg","doi":"10.1016/0094-4548(82)90061-3","DOIUrl":"https://doi.org/10.1016/0094-4548(82)90061-3","url":null,"abstract":"","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 3","pages":"Pages 221-226"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90061-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91681988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90059-5
C.Y. Wang
Due to the complicated geometry, the heat conduction across a bent plate has never been treated analytically before. In this paper we utilize an intrinsic coordinate system in order to obtain the temperature profile by perturbations. The curvature of the plate tends to decrease the local temperature in the vicinity of the bend.
{"title":"A new analytical method for the heat conduction across a bent plate","authors":"C.Y. Wang","doi":"10.1016/0094-4548(82)90059-5","DOIUrl":"https://doi.org/10.1016/0094-4548(82)90059-5","url":null,"abstract":"<div><p>Due to the complicated geometry, the heat conduction across a bent plate has never been treated analytically before. In this paper we utilize an intrinsic coordinate system in order to obtain the temperature profile by perturbations. The curvature of the plate tends to decrease the local temperature in the vicinity of the bend.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 3","pages":"Pages 199-207"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90059-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91764823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90060-1
A. Sharma, D. Garg, J. P. Gupta
{"title":"Solidification fouling of paraffin wax from hydrocarbons","authors":"A. Sharma, D. Garg, J. P. Gupta","doi":"10.1016/0094-4548(82)90060-1","DOIUrl":"https://doi.org/10.1016/0094-4548(82)90060-1","url":null,"abstract":"","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"1 1","pages":"209-219"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77224721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90058-3
G. N. Bochkov, G. F. Efremov, V. Kolpashchikov
{"title":"Towards a nonlinear theory of fluctuations of macroscopic quantities (thermal perturbations)","authors":"G. N. Bochkov, G. F. Efremov, V. Kolpashchikov","doi":"10.1016/0094-4548(82)90058-3","DOIUrl":"https://doi.org/10.1016/0094-4548(82)90058-3","url":null,"abstract":"","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"82 1","pages":"193-198"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90963452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90054-6
W.J. Minkowycz, Ping Cheng
The problem of free convection along a vertical plane source or sink with uniform lateral mass flux in a porous medium is solved by the local non-similarity approximation. Solutions are carried out to the third level of truncation. Results for heat transfer characteristics as obtained from the third level of truncation are found in excellent agreement with a previous investigation using the finite difference method for a wide range of the mass flux parameter.
{"title":"Local non-similar solutions for free convective flow with uniform lateral mass flux in a porous medium","authors":"W.J. Minkowycz, Ping Cheng","doi":"10.1016/0094-4548(82)90054-6","DOIUrl":"10.1016/0094-4548(82)90054-6","url":null,"abstract":"<div><p>The problem of free convection along a vertical plane source or sink with uniform lateral mass flux in a porous medium is solved by the local non-similarity approximation. Solutions are carried out to the third level of truncation. Results for heat transfer characteristics as obtained from the third level of truncation are found in excellent agreement with a previous investigation using the finite difference method for a wide range of the mass flux parameter.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 3","pages":"Pages 159-168"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90054-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89318318","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1982-05-01DOI: 10.1016/0094-4548(82)90055-8
L.R. Hanarp, B.Å. Sundén
An investigation of the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is presented. The investigation has been carried out for the two Reynolds numbers 5·104 and 1·105 with freestream turbulence intensities ranging from 2.5 – 11.5 % and integral scales Λf∞/D ≲ 0.14. Both experiments and numerical calculations show that for the flow ranges considered, the mean velocity field is rather unaffected by the freestream turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 – 1 10 % occur.
{"title":"Structure of the boundary layers on a circular cylinder in the presence of freestream turbulence","authors":"L.R. Hanarp, B.Å. Sundén","doi":"10.1016/0094-4548(82)90055-8","DOIUrl":"10.1016/0094-4548(82)90055-8","url":null,"abstract":"<div><p>An investigation of the influence of freestream turbulence on the temperature and velocity boundary layers on a circular cylinder in cross flow is presented. The investigation has been carried out for the two Reynolds numbers 5·10<sup>4</sup> and 1·10<sup>5</sup> with freestream turbulence intensities ranging from 2.5 – 11.5 % and integral scales <em>Λ</em><sub>f∞</sub>/D ≲ 0.14. Both experiments and numerical calculations show that for the flow ranges considered, the mean velocity field is rather unaffected by the freestream turbulence while the mean temperature field is influenced in such a way that increases in heat transfer of order 8 – 1 10 % occur.</p></div>","PeriodicalId":100875,"journal":{"name":"Letters in Heat and Mass Transfer","volume":"9 3","pages":"Pages 169-177"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0094-4548(82)90055-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88461967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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