The rheological ehupfumi ropa - chii?

Hurongwa, inodzidza deformation uye kuerera maitiro chaiyo continuum, mumwe vamiririri iyo - non-Newtonian zvinwiwa ane STRUCTURAL viscosity, rheology makabuda. Munyaya ino isu funga rheological ehupfumi ropa. Chii, ichava pachena.

tsananguro

A chaiwo non-Newtonian mvura - ropa. Plasma inonzi, kana zviri isina chimiro zvinhu. Blood serum ndiko plasma, iyo haina fibrinogen.

Hemorheology kana rheology, zvokuimba KUONGORORA mapatani, kunyanya sezvo kuchinja fizkolloidnye kweropa ehupfumi panguva aimhanya siyana uye muzvikamu zvakasiyana pamubhedha mudziyo. ehupfumi ayo, ari kushanda mamiriro muropa, kuti contractile mano mwoyo kunotema kufamba ropa mumuviri. Kana Linear velocity kuyerera riri duku, zvacho ropa misha newokuti akabatana ari mudziyo uye kune mumwe nomumwe. Panyaya iyi, iyo layered hunhu aibuda uye kuerera inonzi laminar. Saka chii vari rheological ehupfumi? On ichi - on.

Chii Reynolds Number?

Kana kuwedzera Linear velocity uye kwazvo imwe kukosha, chakasiyana midziyo yose, laminar aibuda achava vortex, kukodzera kunzi inonetsa. Kuchinja havukavu laminar aibuda kune inonetsa anosarudza Reynolds nhamba nokuti ropa mudziyo vanoumba vanenge 1160. Maererano Reynolds nhamba mhirizhonga inogona chete munzvimbo midziyo guru branching, uyewo yeropa. For midziyo yakawanda laminar mvura mvura runoita.

The nokukurumidza uye fura kushushikana

Kwete chete vhoriyamu uye Linear ropa riyerere velocity zvinokosha, dzimwe parameters zviviri zvinokosha zvaizobatsira sangano kuti mumudziyo kuti velocity uye fura mupfungwa. Hwokuratidza voltage ochinja simba kuita pamusoro vascular pamusoro chikwata mune tangential mirayiridzo pamusoro, akayera mu Pascals kana dynes / masendimita ^2. The fura zvazvingava unotaurwa Ivan Kuchin mumasekonzi (s-1), uye rinoreva pamwero mukuru velocity gradient pakati akaturikidzana kuenderana kuti zvinofamba Urume paminiti chikwata kure pakati pavo.

On chii parameters anotomirira rheological ehupfumi?

Nhamba mupfungwa kuti fura mwero anosarudza kuti viscosity ropa, akayera mu mPas. In rose Urume viscosity kunobva fura mwero-siyana 0.1-120 ^S-1. Kana fura mwero> 100 ^s-1, ari viscosity kuchinja haisi saka raidudzwa, uye kusvika fura yevanhu 200 ^s-1 ndiye anenge kuchinja. The ukoshi akayera pamwero fura soro, akadana asymptotic. Huru zvinoita kuti sei viscosity - foni deformability okunze, hematocrit uye aggregation. Uye akapiwa chokwadi kuti masero matsvuku eropa zvichienzaniswa maplatelet uye leukocytes zvakawanda ivo kunyanya kuona masero matsvuku. Izvi zvinoratidzwa rheological ehupfumi ropa.

viscosity zvinhu

Chinhu chinokosha kuziva viscosity - vhoriyamu wevasungwa masero matsvuku eropa, ravo avhareji vhoriyamu uye kugutsikana, ichi anonzi hematocrit. Zviri 0.4-0.5 l / L anenge uye vagara vandifungira centrifugation ropa ivhu. A yeplasma - a Newtonian fluid ari viscosity iyo anosarudza sechivako mapuroteni, uye zvinoenderana tembiricha. Viscosity ndicho chinokosha chaizvoizvo globulins uye fibrinogen. Vamwe vaongorori vanodavira kuti kukosha inotungamirira nokuchinja yeplasma viscosity - ndiyo nhamba mapuroteni: sealbumin / fibrinogen, sealbumin / globulin,. Inosimudzira aggregation kunoitika apo pakutsvaga non-Newtonian maitiro ropa rose, zvichiita erythrocyte aggregation. Vasiri erythrocyte aggregation chinhu reversible muitiro. Ndizvo zvazviri - the rheological ehupfumi ropa.

Education erythrocytes aggregates anoenderana zvinhu zvemaziso, hemodynamic, electrostatic, yeplasma uye nevamwe. Mazuvano, pane zvakawanda dzidziso kuti anotsanangura mashandiro ose erythrocyte aggregation. Best kuzivikanwa nhasi Kukunda dzidziso pamusoro mashandiro naro mabhiriji pakati krupnomolekulyarnyh mapuroteni, fibrinogen, Y-globulins vari adsorbed pamusoro pemvura masero matsvuku eropa. Simba aggregation mambure - kusiyana fura simba (chinokonzera disaggregation), paiva erythrocytes electrostatic kuvenga, ayo isakarurama mhosva, simba iri mabhiriji. The mashandiro mhosva Kuda kutamba ose isakarurama mhosva macromolecules ari matsvuku eropa, kureva, Y-globulin, fibrinogen, harisi zvakajeka asi. Tiripo pfungwa kuti mamorekuru vanoomerera kuonga yokubudisa mauto Van der Waals mauto, uye simba rehydrogen zvisungo.

Kuti rubatsiro rokuongorora rheological ehupfumi ropa?

Nokuda kwechimwewo chikonzero, pane aggregation masero matsvuku eropa?

Tsanangudzo platelet aggregation uyewo nokuda kuparadzwa, kushaya mukuru samolecular mapuroteni pedyo erythrocytes, uye saka maitiro kufurirwa rinooneka, akafanana zvakasikwa kuti osmotic kwokudzvinyirira kwomunhu macromolecular mhinduro, zvichiita kuti convergence yacho akarembedzwa inoramba. Uyezve, pane dzidziso unobatanidza aggregation dzvuku ropa masero kubva erythrocyte zvinoita yaienda zvinoderedza pamusoro Zeta kwaniso uye kuchinja muviri uye chimiro masero matsvuku eropa.

Nokuda ukama viscosity uye erythrocyte aggregation kukwanisa kuongorora ropa rheology uye kunyanya kufamba nenhumbi dzayo, tinofanira kuitisa misoro Kuongororwa maitiro Data. Chimwe chezvinhu zvakafanana uye nyore nzira kuti kuyera aggregation - ane tinyatsonzwisisa erythrocyte sedimentation unodiwa. Zvisinei, mashoko kwakajairika shanduro bvunzo, muduku mashoko, nekuti haimuoni kufunga rheological unhu.

Nzira yakayerwa

Maererano ongororo ropa rheological unhu uye zvinoita kuti chokuita navo, tinogona kugumisa kuti tinyatsonzwisisa rheological zvivako ropa rinokanganisa aggregation wehurumende. Mazuvano, vatsvakurudzi mari yakawanda pakudzidza microrheological zvivako zviri Urume ichi, asi kushanda uye viscometry haana kurasa. Basic nzira nokuti kuyera nzvimbo ropa zvinogona mapoka mapoka maviri: kunetseka munda uye kugozha homogeneous - konusploskost, dzeraundi, cylindrical nezvimwe rheometers vane geometries dzakasiyana kushanda zvikamu; romumunda utachiona uye kunosimbisa nekaupenyu inhomogeneous - panheyo kunyoresa acoustic, magetsi, zvemaziso vibrations, namano kuti ushande Stokes nzira, rirambe richibvira viscometers. Saka akayera rheological ehupfumi ropa, yeplasma uye serum.

Two marudzi viscometers

Chinonyanya hwakapararira Pari vane mhando mbiri viscometers: rotational uye rirambe richibvira. Viscometers anoshandiswawo, yomukati humburumbira iyo floats iri Urume kuedzwa. Tiri kushanda okunatsiridza siyana rotational rheometer.

mhedziso

Zvinofanira kucherechedzwa kuti zvinokosha mberi rheological michina chete tikwanise kudzidza nemakemikari uye biophysical zvivako ropa kumhanya mikroregulyatsiey mu metabolic uye hemodynamic zvirwere. Kunyange zvakadaro, mafambiro panguva kukura nzira kuti kuongorora hemorheology, izvo zvaizoita chinangwa kuratidza aggregation uye rheological zvivako zviri Newtonian zvinwiwa.