![]() ![]() However, the effect of vacuum degree and particle size distribution on the sample temperature variation is not significant, due to the small order of magnitude of the sublimation heat flow compared to the radiation and conduction heat flows. When the radiation heat flow ranges from 39.01 W/m 2 to 45.63 W/m 2 at the heat sink temperature of 120 K, the maximum sublimation rate is 5.79E-15 kg/s, the maximum sublimation area is 1.93E-9 m 2 and the maximum sublimation heat flow is 1.59E-8 W. The heat sink temperature has the greatest effect on the sublimation process, and the vacuum has the least effect. The sublimation process proceeds fastest when the dry soil density is 1200 kg/m 3. The decrease of density makes the sublimation process faster and then slower. ![]() ![]() The larger the radiation heat flow, the higher the heat sink temperature, the smaller the vacuum degree, the larger the average particle size, resulting in a larger sublimation rate. Four operating conditions are established for ground tests, including the influence of heat sink temperature, vacuum level, particle size distribution and dry soil density. Therefore, in this paper, the thermal environment of Shackleton Crater and the particle size distribution of typical lunar soils are analyzed as the basis of parameter settings for the ground test. Simulation of ground-based tests is an effective means to explore the sublimation of ice. The ice mining and utilization is based on the understanding of the sublimation mechanism. Water is very important for human survival. Some lunar exploration missions and studies have shown that ice may exist in the polar regions of the Moon. Obama? Hey, you decide.In recent years, the Moon, as the closest celestial body to the Earth, has become the foremost target of human exploration outward. Donald Trump definitely is extremely ongezellig. One more example - from outside Holland’s borders: Even more so when you so with friends and strangers, all wearing orange, of course. Tax Day definitely is not.Ĭheering on your favorite Dutch sports team, athlete, or race driver - anywhere in the world - is gezellig. Eating dinner at McDonald’s is ongezellig - though here again gezellige friends can make a difference. Watching a movie at home in a gezellige living room (read: warm colors, warm ambiance, full of books, plants 1, and knick-knacks, along with a dog or cat or two) is gezellig, especially if you have gezellige friends over. Old-fashioned shops and boutiques are gezellig modern warehouses are not. Celebrating King’s Day in Amsterdam on a boat full of friends: gezellig! Trying to entertain the inlaws-from-hell is definitely not gezellig. A dentist’s waiting room is not - though it can be gezellig if your friends accompany you, particularly if they are gezellig.Īn evening on the town with friends is gezellig, especially if you have dinner at a gezellig restaurant, see a good movie, and finish with a drink at a gezellige pub. However, to the Dutch it goes way beyond ‘cozy.’ You’ll hear the word a lot when you visit Amsterdam, so here are some indications as to how to understand and use it: Gezellig vs. Its meaning includes everything from cozy to friendly, from comfortable to relaxing, and from enjoyable to gregarious.Īccording to Wikipedia, “A perfect example of untranslatability is seen in the Dutch language through the word gezellig, which does not have an English equivalent. Literally, it means cozy, quaint, or nice, but can also connote time spent with loved ones, seeing a friend after a long absence, or general togetherness.” Locals and foreigners alike will tell you that the word can not be translated. Coffee with a friend: gezellig! On a sunny terrace in the center of Amsterdam? Even gezelliger! Gezellig is untranslatable (You’ll get a chance to hear and practice it further down the page). You’re welcome to try and pronounce it: heh-SELL-ick. Naturally, you’ll find lots of gezelligheid in Amsterdam. The term encompasses the heart of Dutch culture, as the Dutch tend to love all things gezellig. Gezellig is a Dutch word you will hear - and hopefully later use - a lot. What you should know about the Dutch term gezellig What you should know about the Dutch term gezellig. ![]()
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