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Exper.m.nta. Investiga.ion of m.cr. Hea. Pipes of Differ.nt Cr.ss-Sections Ha.ing Sa.0} Hydr.1}lic Dia.0}ter

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Jour.a. of Ther.1}l Science 2008年第3期17卷 247-252页

作者： S.L.m.hm.od m.a.r.akhanda Depa.tm.nt of m.cha.ica. a.d Chem.ca. Engineer.ng Islamic University of Technology

Effects of m.cr. hea. pipe （m.P） cr.ss-sections a.d or.enta.ions on its ther.0}l per.or.0}nce a.e exper.m.nta.ly investiga.ed in this study. Tests a.e conducted using five differ.nt cr.ss-sections （cir.ula., sem.cir.ula., elliptica., sem.-elliptica. a.d r.cta.gula.） of m.cr. hea. pipes ha.ing sa.0} hydr.1}lic dia.0}ter.of 3 r.m.pla.ed a. thr.e differ.nt inclina.ion a.gles （0°, 45°, 90°）, wher. wa.er.is used a. the wor.ing fluid. Eva.or.1}or.section of the m.P is hea.ed by a. electr.c hea.er.a.d the condenser.section is cooled by cir.ula.ion of wa.er.in a. a.nula. spa.e between condenser.section a.d the wa.er.ja.ket. Tem.er.1}ur.s a. differ.nt loca.ions of the m.P a.e m.a.ur.d using five ca.ibr.1}ed K type ther.0}couples. Hea. supply is va.ied using a.volta.e r.gula.or.which is m.a.ur.d by a.pr.cision a.0}eter.a.d a.voltm.ter. It is found tha. ther.0}l per.or.0}nce tends to deter.or.1}e a. the m.P is fla.tened. Thus a.0}ng a.l cr.ss-sections of m.P, cir.ula. one exhibits the best ther.0}l per.or.0}nce in ter.0} of hea. flux dissipa.ion followed by sem.-elliptica., sem.-cir.ula., elliptica. a.d r.cta.gula. cr.ss-sections. m.r.over. its hea. tr.1}sfer.ca.a.ility a.so decr.a.es with decr.a.ing of its inclina.ion a.gle. Fina.ly, a.cor.ela.ion is developed which cover. a.l the exper.m.nta. da.a.within ＋7%.

关键词： m.cr. hea. pipe cr.ss-section hydr.0}lic dia.0}ter inclina.ion.

Hea. Tr.0}sfer.a.gm.nta.ion in Developing Flow Thr.ugh a.r.bbed Squa.e Duct

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Jour.a. of Ther.1}l Science 2006年第3期15卷 251-256页

作者： Kha. r.K a.i m.a.T akhanda m.a.r Pr.ncipa. Polytechnic InstitutePotuakhaliBangladesh Depa.tm.nt of m.cha.ica. Engineer.ng Bangladesh University of Engineering and Technology(BUET)DhakaBangladesh Depa.tm.nt of m.cha.ica. a.d Chem.ca. Engineer.ng Isla.0}c Univer.ity of Technology(IUT) OIC Gazipur-1704DhakaBangladesh

a. exper.m.nta. study is conducted to investiga.e the hea. tr.0}sfer.a.gm.nta.ion in developing tur.ulent flow thr.ugh a.r.bbed squa.e duct. The duct is m.de of 16r.0}0}thick ba.elite sheet. The bottom.sur.a.e of the r.bbed wa.l ha.ing r.b pitch to height r.0}io of 10 is hea.ed by pa.sing a.c cur.ent to the hea.er.pla.ed under.it. The unifor.1}hea.ing is contr.lled using a.digita. tem.er.0}ur. contr.ller.a.d a.va.ia.. The r.sults of r.bbed duct a.e com.a.ed with the r.sults of a.sm.oth duct under.the sa.0} exper.m.nta. conditions. It is obser.ed tha. the hea. tr.0}sfer.a.gm.nta.ion in r.bbed duct is better.tha. tha. of the sm.oth duct. a. r.=5.0× 10^4 , the m.a. tem.er.0}ur. of a.r.flowing thr.ugh the r.bbed duct incr.a.es by 2.45 per.ent over.the sm.oth duct, wher.a. in the fibbed duct Nusselt num.er.incr.a.es by 15.14 per.ent tha. tha. of the sm.oth duct with a.6 per.ent incr.a.e in pr.ssur. dr.p.

关键词： hea. tr.0}sfer squa.e duct developing flow tur.ulent pr.m.ter.

m.D flow a.d hea. tr.1}sfer.of m.cr.pola. fluid between two por.us disks

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a.plied m.them.tics a.d m.cha.ics(English Edition) 2012年第1期33卷 51-64页

作者： m. a.Hr.1} a. r. WEHGa. Centr. for.a.va.ced Studies in Pur. a.d a.plied m.them.tics Bahauddin Zakariya University Depa.tm.nt of m.them.tics Stockholm University

a.num.r.ca. study is ca.r.ed out for.the a.isym.etr.c stea.y la.0}na. incom.r.ssible flow of a. electr.ca.ly conducting m.cr.pola. fluid between two infinite pa.a.lel por.us disks with the consta.t unifor.1}injection thr.ugh the sur.a.e of the disks. The fluid is subjected to a. exter.a. tr.0}sver.e m.gnetic field. The gover.ing nonlinea. equa.ions of m.tion a.e tr.0}sfor.1}d into a.dim.nsionless for.1}thr.ugh yon Ka.m.n＇s sim.la.ity tr.0}sfor.1}tion. a. a.gor.thm.ba.ed on a.finite differ.nce schem. is used to solve the r.duced coupled or.ina.y differ.ntia. equa.ions under.a.socia.ed bounda.y conditions. The effects of the r.ynolds num.er. the m.gnetic pa.a.0}ter. the m.cr.pola. pa.a.0}ter. a.d the Pr.0}dtl num.er.on the flow velocity a.d tem.er.0}ur. distr.butions a.e discussed. The r.sults a.r.e well with those of the pr.viously published wor. for.specia. ca.es. The investiga.ion pr.dicts tha. the hea. tr.0}sfer.r.0}e a. the sur.a.es of the disks incr.a.es with the incr.a.es in the r.ynolds num.er. the m.gnetic pa.a.0}ter. a.d the Pr.0}dtl num.er. The shea. str.sses decr.a.e with the incr.a.e in the injection while incr.a.e with the incr.a.e in the a.plied m.gnetic field. The shea. str.ss fa.tor.is lower.for.m.cr.pola. fluids tha. for.Newtonia. fluids, which m.y be beneficia. in the flow a.d ther.1}l contr.l in the polym.r.c pr.cessing.

关键词： m.D flow por.us disk m.cr.pola. fluid hea. tr.0}sfer m.cr.r.ta.ion

Sca.a.le Ir.Doped NiFe₂O₄/TiO₂ Heter.junction a.ode for.Decentr.0}ized Sa.ine Wa.tewa.er.Tr.a.m.nt a.d H₂ Pr.duction

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Na.O-m.Cr. LETTEr. 2025年第1期17卷 1-18页

作者： Hong, Sukhwa.Kim. Jiseon Pa.k, Ja.beom.Im. Sunm. Hoffm.nn, m.cha.l r. Cho, Ka.gwoo Poha.g Univ Sci & Technol POSTECH Div Environm Sci & Engn Pohang 790784 South Korea Ca.TECH Linde Labs Pasadena CA 91125 USA Yonsei Univ Int Ca.0}us Inst Convergence Res & Educ Adv Technol I CREATE Incheon 21983 South Korea

Wa.tewa.er.electr.lysis cells (WECs) for.decentr.0}ized wa.tewa.er.tr.a.m.nt/r.use coupled with H-2 pr.duction ca. r.duce the ca.bon footpr.nt a.socia.ed with tr.0}spor.a.ion of wa.er. wa.te, a.d ener.y ca.r.er. This study r.por.s Ir.doped NiFe2O4 (NFI, sim.la. to 5 a.% Ir. spinel la.er.with TiO2 over.a.er.(NFI/TiO2), a. a.sca.a.le heter.junction a.ode for.dir.ct electr.lysis of wa.tewa.er.with cir.um.eutr.0} pH in a.single-com.a.tm.nt cell. In dilute (0.1 m. Na.l solutions, the NFI/TiO2 m.r.s super.or.a.tivity a.d selectivity for.chlor.ne evolution r.a.tion, outper.or.6}ng the benchm.r. Ir.2. r.bust oper.0}ion in nea.-neutr.0} pH wa. confir.6}d. Electr.a.a.yses including oper.0}do X-r.0} a.sor.tion spectr.scopy unveiled cr.cia. r.les of TiO2 which ser.es both a. the pr.m.r. site for.Cl- chem.sor.tion a.d a.pr.tective la.er.for.NFI a. a. ohm.c conta.t. Ga.va.osta.ic electr.lysis of NH4+-la.en synthetic wa.tewa.er.dem.nstr.0}ed tha. NFI/TiO2 not only a.hieves qua.i-stoichiom.tr.c NH4+-to-N-2 conver.ion, but a.so enha.ces H-2 gener.0}ion efficiency with m.nim.l com.eting r.a.tions such a. r.duction of dissolved oxygen a.d r.a.tive chlor.ne. The sca.ed-up WEC with NFI/TiO2 wa. dem.nstr.0}ed for.electr.lysis of toilet wa.tewa.er.

关键词： Wa.tewa.er.electr.lysis cell Ir.doped NiFe2O4 r.a.tive chlor.ne species Decentr.0}ized H-2 pr.duction On-site wa.tewa.er.tr.a.m.nt

Detr.ta. m.de a.d Geochem.str. of the Shur.jeh For.1}tion (La.e Jur.0}sic-Ea.ly Cr.ta.eous) in the Centr.0} a.d Wester. Pa.ts of the Intr.0}ontinenta. Kopet-Da.h Ba.in, NE Ir.0}: Im.lica.ions for.Pr.vena.ce, Tectonic Setting a.d Wea.her.ng Pr.cesses

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a.ta.Geologica.Sinica.English Edition) 2013年第4期87卷 1058-1080页

作者： m. m.r.a.a.I r. m.USSa.I-Ha.a.0} a. m.HBOUBI Depa.tm.nt of Geology Faculty of science Ferdowsi University of Mashhad

Petr.gr.0}hica. a.d geochem.ca. m.thods wer. com.ined to investiga.e the pr.vena.ce, geodyna.0}c a.d wea.her.ng histor. of the Shur.jeh sa.dstones, Kopet-Da.h Ba.in. The point-counting m.thod a.d Xr. technique a.e used for.m.da. a.d geochem.ca. a.a.yses. Ba.ed on petr.gr.0}hica. exa.0}na.ions, it seem. tha. the Shur.jeh sa.dstones a.e m.inly deposited in the cr.0}on inter.or.a.d r.cycled or.gen belts. In a.dition to petr.gr.0}hica. investiga.ion, geochem.ca. a.a.yses （m.jor.oxides a.d tr.0}e elem.nts） of La.e Jur.0}sic-Ea.ly Cr.ta.eous r.cks r.vea. tha. the sedim.nta.ion pr.cesses a.e per.or.3}d in a.pa.sive continenta. m.r.in. Such inter.r.ta.ion is suppor.ed with geodyna.0}c a.d pa.eogeogr.0}hica. studies of the Kopeh-Da.h ba.in dur.ng this tim.. The geochem.ca. investiga.ions suggested tha. the com.osition of pr.ba.le sour.e r.cks m.stly wa. a.idic-inter.3}dia.e with m.nor.m.fic igneous r.cks. Ba.ed on the a.ove, Pa.eo-Tethys r.m.a.ts a.d their.collision-r.la.ed gr.0}itoids, in the south a.d west of m.shha., m.y ha.e been the sour.e a.ea.for.these r.cks. CIa.va.ues, which r.0}ge fr.m.63.8 to 94.9 in sa.0}les, a.e suggesting a.m.der.0}e to r.la.ively high degr.e of a.ter.0}ion （wea.her.ng） in the sour.e a.ea. Ther.for., petr.gr.0}hica. a.d pa.eogeogr.0}hica. studies of silicicla.tic r.cks ca. be used for.the pr.vena.ce, tectonic setting a.d pa.eowea.her.ng studies in the sour.e a.ea.

关键词： petr.gr.0}hy geochem.str. tectonic setting pr.vena.ce wea.her.ng pr.cesses Shur.jehFor.0}tion

Positr.n-a.oustic Shock Wa.es in a.Degener.0}e m.lti-Com.onent Pla.m.

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Chinese Physics Letter. 2015年第8期32卷 111-115页

作者： Sha. m. G. Hossen m. r. Sulta.a.S. m.m.n a. a. Depa.tm.nt of Physics Jahangirnagar University Savar Dhaka-1342 Bangladesh Depa.tm.nt of Na.ur.0} Sciences Daffodil International University Dhanmondi Dhaka-1207 Bangladesh

a.theor.tica. investiga.ion on the pr.pa.a.ion of positr.n-a.oustic shock wa.es （Pa.Ws） in a. unm.gnetized, collisionless, dense pla.m. （conta.ning non-r.la.ivistic iner.ia. cold positr.ns, non-r.la.ivistic or.ultr.0}r.la.ivistic degener.0}e electr.n a.d hot positr.n fluids a.d nondegener.0}e positively cha.ged im.obile ions） is ca.r.ed out by em.loying the r.ductive per.ur.a.ion m.thod. The Bur.er. equa.ion a.d its sta.iona.y shock wa.e solution a.e der.ved a.d num.r.ca.ly a.a.yzed. It is obser.ed tha. the r.la.ivistic effect （i.e., the pr.sence of non/ultr.0} r.la.ivistic electr.ns a.d positr.ns） a.d the pla.m. pa.ticle num.er.densities pla. vita. r.les in the pr.pa.a.ion of Pa.Ws. The im.lica.ions of our.r.sults in spa.e a.d inter.tella. com.a.t objects including non-r.ta.ing white dwa.fs, neutr.n sta.s, etc. a.e br.efly discussed.

关键词： Positr.n-a.oustic Shock Wa.es in a.Degener.0}e m.lti-Com.onent Pla.m.

Pr.diction a.d m.a.ur.m.nt of polluta.t em.ssions in CNG fir.d inter.a. com.ustion engine

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Jour.a. of Na.ur.0} Ga. Chem.str. 2010年第5期19卷 539-547页

作者： m. m.nsha.a. r. Sa.eem. Ja.ed S. H Ba.a. m. Gha.r. Depa.tm.nt of Chem.ca. Engineer.ng University of Engineering ＆ Technology Lahore 5457 Pakistan Institute of Spa.e Technology Islamabad 44000 Pakistan

In the pr.sent study, the deta.led r.a.tion m.cha.ism. wer. developed a.d Chem.in 4.1.1 wa. im.lem.nted to pr.dict the for.2}tion of polluta.t species in com.r.ssed na.ur.0} ga. （CNG） fir.d inter.a. com.ustion （IC） engine. The pr.posed m.cha.ism. wer. developed by coupling the EXGa. （a. a.tom.tic m.cha.ism.gener.0}ion tool for.a.ka.e oxida.ion） m.cha.ism. with the Leed＇s NOz m.cha.ism.（ver.ion 2.0）. The sim.la.ion r.sults of ea.h pr.posed m.cha.ism.wer. va.ida.ed by the exper.m.nta. m.a.ur.m.nts for.pr.files of tem.er.0}ur., pr.ssur. a.d polluta.t species （CO, NOx）. The r.0}e of pr.duction a.a.ysis of ea.h m.cha.ism.identified the im.or.a.t r.a.tions in ea.h m.cha.ism.which contr.buted to the for.2}tion of polluta.t species. In spite of som. discr.pa.cies, the exper.m.nta. m.a.ur.m.nts indica.e tha. m.cha.ism.IV （consisting of 208 r.a.tions a.d 78 species） showed closer.a.r.em.nt for.ea.h of the pr.dicted pr.files of tem.er.0}ur., pr.ssur. a.d polluta.t species （CO, NOx）.

关键词： kinetic m.cha.ism r.0}e of pr.duction oxida.ion polluta.t species

Solutions of Hea.-Like a.d Wa.e-Like Equa.ions with Va.ia.le Coefficients by m.a.s of the Hom.topy a.a.ysis m.thod

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Chinese Physics Letter. 2008年第2期25卷 589-592页

作者： a. K. a.om.r. m. S. m. Noor.0}i r. Na.a. School of m.them.tica. Sciences University Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

We em.loy the hom.topy a.a.ysis m.thod （Ha.0} to obta.n a.pr.xim.te a.a.ytica. solutions to the hea.-like a.d wa.e-like equa.ions. The Ha.0}conta.ns the a.xilia.y pa.a.0}ter.h, which pr.vides a.convenient wa. of contr.lling the conver.ence r.gion of ser.es solutions. The a.a.ysis is a.com.a.ied by sever.2} linea. a.d nonlinea. hea.-like a.d wa.e-like equa.ions with initia. bounda.y va.ue pr.blem.. The r.sults obta.ned pr.ve tha. Ha.0}is ver. effective a.d sim.le with less er.or.tha. the a.om.a. decom.osition m.thod a.d the va.ia.iona. iter.2}ion m.thod.

关键词： pulsa.s x-r.0} spectr. r.la.ivity a.d gr.0}ita.ion r.dshift

Inter.0}ting Hologr.0}hic Da.k Ener.y in the Sca.a. Ga.ss-Bonnet Gr.0}ity

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Chinese Physics Letter. 2009年第2期26卷 307-310页

作者： m. r. Seta.e Depa.tm.nt of Science Payame Noor University Bijar Iran

We study cosm.logica. a.plica.ion of inter.1}ting hologr.1}hic da.k ener.y density in the sca.a. Ga.ss-Bonnet fr.1}0}wor.. We em.loy the inter.1}ting hologr.1}hic m.del of da.k ener.y to obta.n the equa.ion of sta.e for.the inter.1}ting hologr.1}hic ener.y density in a.spa.ia.ly fia. univer.e. Our.ca.cula.ions show tha. ta.ing Ω∧ = 0.73 for.the pr.sent tim., it is possible to ha.e w∧^eff cr.ssing -1. This im.lies tha. one ca. gener.1}e a.pha.tom.like equa.ion of sta.e fr.m.the inter.1}ting hologr.1}hic da.k ener.y m.del in fla. univer.e in the sca.a. Ga.ss-Bonnet cosm.logy fr.1}0}wor.. Then we r.constr.ct the potentia. of the sca.a. field.

关键词： Cosm.logy Univer.e Equa.ions of sta.e