A danko ruwa

Kafin mu yi magana game da kaddarorin ruwa, shi wajibi ne don magance manufar "ruwa." Shi ne bayyananne ruwa, wadda a mafi yawan lokuta ba shi da wani halayyar launi ko wari. Lokacin da ruwa ya wuce a cikin wani jiki jihar, shi Forms Kalam wanda ake kira a matsayin kankara, snow (m jihar) ko tururi (gaseous jihar). An yi imani da cewa da ya rufe fiye da 70% na surface na duniyarmu - yana da duk wani nau'i na teku, da teku, da waɗansu kõguna, tabkuna, glaciers da sauran hydrological abubuwa.

Ruwa ne mai karfi da sauran ƙarfi wanda a yanayi qunshi wani jam'i na ma'adinai salts da kuma daban-daban gas. Idan muka magana game da jiki Properties, sa'an nan nan da nan juya mu da hankali ga gaskiyar cewa da narkewa na kankara qara ta yawa, yayin da a wasu abubuwa irin tsari ne daidai gaban.

Babban alama ne ruwa danko. By kanta, da ƙarfi - da ikon da wani abu (ko ruwa, gas, ko m jiki) don samar da juriya a lokacin motsi na particulate abu game da juna. Wannan yanayin na iya zama na biyu iri - girma da kuma tangential. Volume danko - shi ne ikon da wani abu don yin tensile karfi. Yana bayyana kanta a cikin yaduwa daga sauti a ruwa, ko ultrasonic taguwar ruwa. Tangential faye hali danko ruwa ikon tsayayya karfi.

Lokacin da masu bincike sun bincika danko na ruwa, an gano cewa, da juriya na abu a lokacin da ya miƙa kuma canjawa dogara a kan gudun motsi na barbashi daban-daban yadudduka na ruwa. Idan Layer cewa motsa da sauri, abubuwa a kan Layer na motsi sannu a hankali, da accelerating karfi ne actuated. Idan duk abin da yake daidai gaban, shi zai fara zuwa aiki da braking karfi. A bisa} o} arin da ake directed a wani tangent zuwa saman na yadudduka.

Kamar yadda ya Newton ta dokar yana da wani dabara τ = μ dυ / DN, bisa ga abin da ciki gogayya karfi ne na gwargwado ga gudu dan tudu tare da al'ada da kuma tasiri yankin. Idan sanyã frictional karfi ga yankin wanda yake daidai da hadin kai, sa'an nan mu sami sausaya danniya a cikin ruwa da aka sanya a cikin sama dabara.

Akwai kuma wani ra'ayi kamar kinematic danko ruwa. Su kaddamarda da tsauri coefficient rabo (μ) zuwa wani zabi ruwa yawa (ρ). A wani dabara wannan magana zai kasance kamar haka: ν = μ / ρ.

A danko ruwa a daban-daban yanayin zafi juya hali, Ina nufin ta coefficient dabi'u rage tare da kara yawan zafin jiki. Saboda haka, tsauri danko a gishiri da ruwa zai zama dan kadan daban-daban daga sabo ne coefficient. A kirga bambanci na index zai canza cikin game da 5%.

Daya zai iya buga da dama dabarbari, amma shi ne m, a matsayin babban abu da aka bayyana a baya. A danko ruwa ta definition iya bambanta, ba a ma maganar jihohin tari na al'amarin. Wadannan bayanai suna da muhimmanci a cikin jirgin sama da kuma Shipbuilding da wasu sauran masana'antu.

Akwai musamman tebur domin sanin danko ruwa a daban-daban da zazzabi yanayi. Wannan abu za a iya amfani ba kawai a ka'idar amma kuma a yi. Tebur ƙunshi data a kan jinkiri na 5 digiri, jere daga 5 da kuma kawo karshen tare da 100 digiri, wanda ƙwarai facilitates rayuwa da malamai da dalibai a lokacin shiri.

Wani muhimmin siga - tsauri kinematic danko na ruwa, abin da ake kira na biyu danko (girma) - shi ne mai halayyar volumetric matsawa nakasawa. Yana taka muhimmiyar rawa a cikin attenuation na sauti da kuma rage buga taguwar ruwa.